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How to Win on Ebay: Snipe

grammar fascist writes "A study by South Korean physicists confirms what some of us have taken for granted for a long time: a single bid at end of auction nets the most wins. From the article: 'Plugging all those data into the model and testing the outcome in terms of how the auctions turned out, the team found that the probability of submitting a winning bid on an item indeed drops with each bid. "Our analysis explicitly shows that the winning strategy is to bid at the last moment as the first attempt rather than incremental bidding from the start." The study appears in the current Physical Review E journal.'"

51 of 676 comments (clear)

  1. And this is indeed a serious problem with EBay... by nweaver · · Score: 5, Insightful

    Proxy bidding is supposed to allow easy auctions with fairness. The problem is the sniping phenomenon. And there is an easy fix: A bid will extend the auction by ~10 minutes if received in the last 10 minutes. Voila, no more sniping.

    --
    Test your net with Netalyzr
  2. Not only that by roman_mir · · Score: 4, Insightful

    but I bet this is the best strategy to result in lowest prices at the end of the auction and this is the strategy I've been using for the past six years to win and keep the costs to a minimum.

  3. So... by gsfprez · · Score: 4, Funny

    should i wait to say "First Post" 7 days from now?

    --
    guns kill people like spoons make Rosie O'Donnell fat.
  4. In other news . . . by Orange+Crush · · Score: 4, Funny

    . . . East Ukrainian dentists declare in their recent study that "Manned spaceflight is more difficult than they thought."

    (Seriously . . . shouldn't physists be studying . . . I dunno . . . physics?)

  5. Did they miss the obvious? by Bombcar · · Score: 4, Insightful

    If you bid more than once on an item, someone must be bidding against you, so of course your chances are reduced.

    If you only bid once on an item, it could be the only bid. I wonder if they controlled for that.

  6. People are strange and irrational by Hoplite3 · · Score: 4, Interesting

    Ebay allows users to set their secret maximum bid, so in a rational world a bidder just sets this at the highest price he's willing to pay. However, rational thought has nothing to do with markets (except in economics textbooks, for some reason), so people keep ratcheting up their maximum bid to win. The result is that the "max bid" system doesn't perform as it was intended, but it was a good idea.

    Not the first good idea to be defeated by irrationalism, and not the last.

    --
    Use the Firehose to mod down Second Life stories!
    1. Re:People are strange and irrational by null+etc. · · Score: 5, Insightful
      Not the first good idea to be defeated by irrationalism, and not the last.

      This isn't as irrational as you might suppose.

      I might bid a maximum of $75 on an old computer that's hard to find, but once I find out that 4 other people are willing to bid higher than that, the perceived value of the old computer has now risen in my eyes, based on the perceived demand. I therefore might be willing to spend more money on that old computer, knowing that the market is large enough so that I could sell it back if I wanted to.

  7. Another strategy to add to this by cazbar · · Score: 5, Interesting

    People like to bid based on even dollar amounts. I've won auctions by bidding 2-3 cents more than the even dollar amount.

    For example, if you want to bid $20 for something, bid $20.02 instead so if somebody else puts a bid of $20 on it, you still win.

    1. Re:Another strategy to add to this by sheldon · · Score: 5, Funny

      Which is why I bid $20.25!

  8. Old news by epsalon · · Score: 4, Informative

    The acutal paper is from 2000. This has been tought for the past 3 years in an undergraduate eCommerce course.

    The paper has an interesting comparison between eBay and Amazon, for two distinct cases: common value and private value.

  9. One Step Back... by TheRequiem13 · · Score: 5, Funny

    Studying ebay counts as physics in South Korea?

    What's the probability of overpriced shipping?

    --
    What?
  10. Steps to profit by BertieBaggio · · Score: 5, Funny

    1 Snipe eBay auctions
    2 ?????
    3 Profit!

    Actually, I have a forumla that gives the best chance of winning an auction: bid 10x what the item is worth. Can I have some money to study the obvious^H^H^H^H^H^H^H^H research the tricky questions of our age now please?

    The fact that this was tagged as duh before it had any comments is very telling.

    --
    If all you have is a grenade, pretty soon every problem looks like a foxhole -- MightyYar
  11. Re:And this is indeed a serious problem with EBay. by Kaenneth · · Score: 5, Funny

    Heisenbidding: You can know how much you will pay, OR if you'll get the item or not, but you can't know both.

  12. Exactly why I don't bother with eBay ... by Conspiracy_Of_Doves · · Score: 4, Insightful

    ... unless the item has a 'Buy It Now' button.

  13. Re:And this is indeed a serious problem with EBay. by ePhil_One · · Score: 5, Insightful
    but getting sniped at the end of the auction you really wanted sure sucks

    Wouldn't eBay's automatic bidding prevent that? If you were willing to bid $20 and it was currently at $10, th esniper needs to bid $21 to win, which is in theory more than you were willing to pay. Personally I'm suspicious of such tools, but the idea is in the event of a tie the earliest bidder wins, right?

    --
    You are in a maze of twisted little posts, all alike.
  14. Re:And this is indeed a serious problem with EBay. by bcattwoo · · Score: 5, Insightful

    How is this such a problem? I don't really get what is not "fair" about sniping?

    If the dumbasses that got their auction "stolen" at the last minute didn't put in the absolute maximum that they wanted to pay for the item, then that's their own fault. Either your willing to pay more than anyone else or your not. If you don't put your maximum bid in straight off and keep incrementing your bid, you are really just engaging in really inefficient sniping.

    Adding a ten minute extension wouldn't really solve this. It would work great for sellers because the emotionally invested bidders would run up their bids more than they otherwise would. The buyers however would be better off just joining the snipers rather than fighting them. If everyone sniped it would basically revert to the pre-sniping days.

  15. Exactly: money is no object by jfengel · · Score: 4, Insightful

    Sniping works when people don't actually know what something is worth. Every time you make a bid, you literally raise the price of the item: you declare that it's worth at least this much to you. And if nobody knows what the price is, they know that it's worth a little bit more when you raise the price.

    By sniping, they lower the final price by hiding the information of what they're willing to bid. The auto-bidding feature is supposed to do that for you, but information still leaks out: it tells you the value of the second-higest bid, which is probably close to that of the highest bid. It's a good proxy of the actual price, and you're raising that.

    Personally, I don't get too bugged about the snipers. I know what it's worth to me and let the auto-bidders handle it. If I get sniped, it means they were willing to pay more than I was. The seller gets screwed a bit, because the sniper was hiding their willingness to pay more (and therefore probably more than they ended up paying.) But the only thing being done to me as a bidder is that I got my hopes up.

    So I don't get my hopes up, and I don't bid on eBay for anything I really, really want. I use eBay not for its auction, but for its flea-market: the ability to get stuff I can't get elsewhere. I usually just pay the "buy it now" price.

  16. Re:And this is indeed a serious problem with EBay. by cayenne8 · · Score: 4, Interesting
    " There is a problem, though, in that it will not help out folks who live in different time zones. If the auction ends at a time when I would rather be asleep..."

    Well, there you have it...like most things in life, you gotta figure out what you want and how badly.

    If there is something I really want, I've set my alarm to wake up just to bid on the item...and crash back again after it is over.

    I see nothing wrong with sniping. If you have set your bid to the absolute maximum you are willing to pay, and not a cent more...if no one snipes it at that $$ amount...you will still win. If someone outbids your bid at the last second...well, in your mind you should say.."They paid too much for that..."

    This works pretty closely to a live auction. People can keep bidding till the hammer drops. Sure, it keeps going while bids keep coming in, but, that is the little difference between eBay and a live auction. At least with eBay you CAN win and don't HAVE to be there live.

    --
    Light travels faster than sound. This is why some people appear bright until you hear them speak.........
  17. Re:And this is indeed a serious problem with EBay. by robnator · · Score: 5, Insightful

    robnator's a bit slow... if everyone snipes to win auctions, what's the trouble? If you really wanted it, you'd snipe with bids like $1000...

    thing with the auction concept is you're SUPPOSED to bid what you'd like to pay if no one else is running up the price (rinse. lather, repeat) until you reach your wallet's limit. eBay's modification imposes a time limit to keep auctions from taking forever, but with the maximum bid concept it brings its 'auction' back towards the original.

    the reason people snipe (vs. just bidding their personal maximum to start) is fear of being run up by shills. it's a survival mechanism for your money, if such a thing isn't self-contradicting on eBay...

    --
    "If...you can't be a good example, then you'll just have to be a horrible warning" - Catherine Aird
  18. Re:And this is indeed a serious problem with EBay. by Golias · · Score: 5, Insightful

    Well, the buyer has to
    pay more, but getting sniped at the end of the auction you really wanted sure sucks, so in that way the buyer
    wins.


    If you "really wanted" the item, why wasn't your maximum bid price higher?

    When I buy something on eBay, I always bit the most I'm willing to pay for the item. The items I win are usually nowhere close to what my maximum bid could have been, and the items I don't win sold for more than I was willing to spend.

    Snipers cost people like me nothing. The only way they can hurt you is if you are compulsive spender who suddenly wants something even more just because somebody else was willing to pay $1.50 more than you originally thought it was worth.

    --

    Information wants to be anthropomorphized.

  19. Re:And this is indeed a serious problem with EBay. by isaac · · Score: 5, Insightful
    Proxy bidding is supposed to allow easy auctions with fairness. The problem is the sniping phenomenon. And there is an easy fix: A bid will extend the auction by ~10 minutes if received in the last 10 minutes. Voila, no more sniping.


    eBay has certainly considered and rejected this idea. If this were an auction type offered on eBay, every rational seller would choose it.

    The reason it's not offered is that eBay is more dependent on bidders than sellers at the end of the day. Yes, sellers pay the fees to eBay, but sellers are less mobile than buyers - if a seller is not going to use eBay, what will they use? No other auction site has traffic within an order of magnitude of eBay. Most sellers' only other rational option is a local fixed-price sale through, e.g. craigslist - not an acceptible option to many sellers. Thus, how the sellers feel about sniping is immaterial to eBay - they're the only game in town and the sellers will come anyway.

    OTOH, buyers care less about where they buy things than sellers do about how they sell them. Change the rules on eBay at this point and they will alienate their base of idiots^Wbuyers - the traffic that keeps eBay the only game in town. They already have a major fraud problem that's driving sales of some especially fraud-prone categories like computers and electronics to sites focusing on local cash deals like craigslist. The last thing they want is to change anything else that might alienate buyers.

    (Yes, some buyers hate sniping, but most buyers hate bidding wars even more. Anything that helps sellers raise their average sale price hurts buyers, and since the buyers are what bring in the sellers...)

    -Isaac

    --
    I am not a lawyer, and this is not legal advice. For Entertainment Purposes Only.
  20. Re:Sure, but... by p0tat03 · · Score: 5, Insightful

    It becomes psychological. I'm an armchair sniper for everything I do on eBay for the following reasons: 1 - People get emotionally invested in auctions for items they really want, especially eBay newbies. By competing with them, you are goading them into increasing their maximum - which screws you as much as it screws them. When the competitive spirit is introduced your price jumps up. 2 - Normal non-sniping bidders most likely will not be watching the final seconds of an auction, so you deny them the opportunity to revise their bid and possibly outbid you; again, this comes down to the competitive spirit and peopel going "weeeeeeell, I suppose I can pay $30 instead of $25..." 3 - As other poster suggests, you hide the true value of something. Most seasoned eBay users will simply go to identical past items to get a bead on what to expect, but often I see auctions go *above* MSRP. You do not want to give away what you're willing to pay for it until you absolutely must.

  21. I LOVE Korea by DysenteryInTheRanks · · Score: 5, Funny

    South Korea!

    First they had a veterinarian who claimed to clone the first human!

    Now they have a PHYSICIST who claims to be an expert on EBAY AUCTIONS!

    Next up: a lawyer who can communicate with dolphins!

    Yay Korea! Insane on both halves of the peninsla!

  22. Re:And this is indeed a serious problem with EBay. by rwyoder · · Score: 5, Interesting
    Proxy bidding is supposed to allow easy auctions with fairness. The problem is the sniping phenomenon. And there is an easy fix: A bid will extend the auction by ~10 minutes if received in the last 10 minutes. Voila, no more sniping.
    Or randomize the time the auction ends. i.e. eBay will tell you what *hour* the auction will end, but the auction will end on some random *minute* after that hour.
  23. Re:And this is indeed a serious problem with EBay. by blincoln · · Score: 4, Insightful

    I have heard that Idea before, and it seems to be a win win for everyone, why won't ebay chage their model?

    From my perspective, I don't like that model because I know how much it will inflate the price of items on eBay. The reason I snipe is because I learned years ago that people get attached to the particular item they're bidding on, and if given the chance will end up ratcheting the price well beyond what it's actually worth because they got caught up in trying to win.

    If eBay implemented a system like you describe, I think that while they would make more money from each auction, total use of the system would decline because most people aren't interested in paying high prices.

    --
    "...always new atoms but always doing the same dance, remembering what the dance was yesterday." -Richard Feynman
  24. Re:And this is indeed a serious problem with EBay. by bcattwoo · · Score: 4, Insightful
    You are correct, in the event of a tie the earliest bid wins. Also the increments can get odd when eBay's automatic bidding decides things, so you can lose by a penny if the other person's max bid is even a penny more than yours. The set increments only matter when placing a bid, you have to bid at least one set increment higher than the current winning bid, but the final winning bid doesn't have to be by a set increment, just higher than any other bids.

    That is why it is always worth bidding an oddball amount slightly higher than your target bid, like $20.53 instead of $20 even.

  25. Bid what you want to spend... by Evro · · Score: 5, Informative

    It sounds like one of the basic assumptions of this article is that the object of ebay is to win. That's an incorrect assumption: the object of eBay is to get what you want at the lowest price you're willing to spend. If you're only willing to spend $25 on an iPod, put in a bid of $25. eBay's proxy bidding will handle the pissant bidders trying to nickel and dime their way up. Eventually one of two things will happen: A) you'll be the high bidder and get the item you want for a price less than or equal to the amount you wanted to pay, or B) someone will outbid you and you won't get the item at the price you want, at which point you can either let it go or re-evaluate the amount you're willing to spend.

    People get caught up in the "game" of bidding on eBay which is how you see digital cameras that retail for $299, and sell on Amazon for $240, sell on eBay for $320 -- that's an example I've seen with my own eyes. People are stupid and so sniping is effective.

    --
    rooooar
  26. Re:And this is indeed a serious problem with EBay. by technothrasher · · Score: 5, Interesting
    The people who come in and snipe at the last minute always end up paying more than I would have for the item because I set my one bid to what I'm willing to pay and then leave the auction alone.


    But the problem with this is that you never win the item. If you still just bid the one amount you're willing to pay, but you do it with a snipe, you're much more likely to actually get the auction item. Using a snipe program like jbidwatcher, it's just as easy to snipe as it is not to, so why wouldn't you?
     

  27. Re:And this is indeed a serious problem with EBay. by Red+Flayer · · Score: 5, Funny

    Schrodinger's Bid:
    You either won the auction at the moment you placed your bid, or you lost. Until you view the auction results, both are true.
    Oh yeah, also, you were bidding on a cat that was possibly gassed to death.

    Fermi's Bid:
    As long as your result is within an order of magnitude of the highest bid, you win.

    --
    "Trolls they were, but filled with the evil will of their master: a fell race..." -- J.R.R. Tolkien on Olog-hai
  28. Article SHOULD read by iJed · · Score: 4, Funny

    "A study by South Korean physicists confirms that people can in fact make money out of stating what is blatantly obvious to everyone"

  29. Re:Exactly by Jerf · · Score: 4, Insightful

    No. In the event of two "most money"s (of identical size), the earlier bid wins.

    I'm still trying to figure out why "putting in the max value you mean to pay as soon as possible" is not the optimal strategy. I don't eBay much, but I don't get sniped, because I do this. All sniping does is raise the amount I have to pay (but still at or below my max) at the last minute in a way I completely expect, or causes the amount to go over what I'm willing to pay, in which case I shrug and move on with life.

    This whole sniping thing is one of the larger gigantic wastes of time and fury I can think of. Use the system as designed and it all works.

  30. Re:And this is indeed a serious problem with EBay. by CCFreak2K · · Score: 5, Interesting

    Adding a ten minute extension wouldn't really solve this. It would work great for sellers because the emotionally invested bidders would run up their bids more than they otherwise would. The buyers however would be better off just joining the snipers rather than fighting them. If everyone sniped it would basically revert to the pre-sniping days.

    But think about a real auction: If the auctioneer says "going once...twice..." the item doesn't just go to the person who threw up their paddle at the last moment. It gets extended for another five seconds or so. Now, maybe the same dynamics don't work in the web world, but at least it puts perspective into it.

    What if eBay also had another auction type in addition to normal and Buy It Now ones: silent auctions. It tells you when it ends, the seller may optionally give a reccomended amount, and you get to put in your bid, without knowing what anyone else put down. Now you'd be more compelled to put your maximum bid down.

    --
    "Beware of he who would deny you access to information, for in his heart he dreams himself your master."
  31. AAAAAAA++++++++++ by wheany · · Score: 5, Funny

    A+A+A+AAAAAAA++++++ Great article, would read again.

  32. thing is by petermgreen · · Score: 5, Insightful

    you get a lot of people who really wan't the item but have set a budget, by bidding early you get theese people caught in the heat of the bidding action and encourage them to bust thier budget.

    the result is they overpay for the item and you don't get it at all, the only winner is the seller.

    sniping does not encourage this behaviour as by the time they see thier outbid its too late.

    --
    note: i'm known as plugwash most places but i screwd up registering that here somehow in the past and now can't register
  33. Re:Exactly by froschmann · · Score: 4, Insightful

    Because not everyone snipes, and not everyone bids their maximum. Most of the time, if you bid your max amount earlier, someone who was beaten will rethink and place a second bid. If you bid with a second left, the impulse people can't do that.

  34. Re:And this is indeed a serious problem with EBay. by Johnboi+Waltune · · Score: 5, Informative

    Every buyer with any brains at all figures out sniping is the way to go. I have been a seller for over 5 years, and I make more money on my auctions when I have them end on a Sunday afternoon. More people are home, near their computers, and ready to snipe at that time. I don't ship internationally (too much fraud), so time zones aren't really an issue.

    I often get no bids at all up until the last 30 minutes of an auction, when 10 or 20 can suddenly come in.

    --
    "The advanced societies of the future will be driven by competing systems of psychopathology." -JG Ballard
  35. Re:Exactly by Aim+Here · · Score: 5, Insightful

    Everyone with a brain is agreed that a single maximum-price-you-want-to-pay bid is the best policy.

    Your problem is that you don't realise that there are a lot of nonlogical people out there, who don't bid their maximum price, but put in a bid, then if they see they've been outbid, put in another one and so forth. To minimise the inflationary effect of those fools, bid as late as possible, not as early as possible.

    That's why sniping is the smart move. It's not the snipers that are the cause of the "problem", it's those incremental bidders. Snipers are just keeping your price DOWN (despite all appearances to the contrary) to the benefit of all bidders...

  36. Re:Exactly by gurps_npc · · Score: 4, Insightful
    I have to say you have been tricked. You fell for for a very very old trick.

    You got caught up in the game of 'obtaining the product'. You do not go to an auction to obtain the product. You go the STORE to obtain the product. Anyone can "obtain the product" at any auction. I can beat your silly Snipig strategy simply by offering 10 times the value of the product as my max bid.

    Only a fool would do that you say? Of course. Any strategy that is the 'best strategy to win an auction is by definition something only a fool would do. That is the nature of auctions. When you go to an auction the point is NOT to obtain the product.

    Instead the point is to get the product at a CHEAPER price than standard

    Any time there are people out there sniping on a product than whoever wins the bid is BY DEFINITION THE LOSER, not the winner.

    I used to hate being sniped, but then I fell in love with it - it protected me from over-paying for something.

    The real way to 'win' at the auction is instead to find a product that has so little interest that people are not sniping. You also generally have to totally avoid 'business' sales and look for the UN-professional, individuals doing the selling. Key things to do are to look for mis-spellings, and poor pictures.

    --
    excitingthingstodo.blogspot.com
  37. Re:And this is indeed a serious problem with EBay. by Prairiewest · · Score: 5, Insightful
    If there's an item that you're willing to pay up to $10 for, you would probably still take it for $10.05.

    Then $10.00 wasn't really a maximum value was it? The fault would be yours for not bidding $10.05 in the first place. If you bid your absolute maximum amount on every auction, then when you get outbid you won't feel bad for losing the auction.

    Works for me - I see something I like, then I bid my max and forget about it. If I get an email later saying that I won the auction, I go back and pay. I turn off those uselsss "you have been outbid" emails.

  38. Re:Exactly by gurps_npc · · Score: 4, Insightful
    It IS the best strategy. The fools did the study wrong.

    Look, what would have happened if they also tested the "Moron's Ebay Strateg". That strategy is simple - offer 10 times the actual value of the item. See a computer worth 2,000? Put in a Max bid of 20,000.

    Guess which strategy 'wins' the auction?

    The study is flawed, it asked the stupid question, not the smart one.

    If you want to BUY something, go to the store.

    If you want to "Pay less money than at a store", then go to Ebay, and DON'T TRY TO WIN THE AUCTION.

    If you consistently win the auction, that means you paid too much money for the item.

    Instead, keep using the "Put the max value you will pay", and do it in the RIGHT auctions.

    How to find the right auctions?

    Look for NON-businesses. (They put in a floor and are just wasting your time 90%) Look for mis-spelled products. And look for things that have few bidders. And be ready to LOSE MOST of the biddings to fools that paid too much. And be ready to accept a product that is not exactly what you wanted, but satisfies your needs for much less than what you expected to pay.

    --
    excitingthingstodo.blogspot.com
  39. Sniper fees by metamatic · · Score: 4, Interesting

    I've been thinking of adding something to my auctions saying "$2 discount if you bid before the last hour". Hence effectively implementing a "sniper fee" to discourage snipers--the idea being that by encouraging early bidders, you effectively raise the visible value of the item. Has anyone tried this?

    --
    GCHQ Quantum Insert installed. If only our tongues were made of glass, how much more careful we would be when we speak
  40. Re:And this is indeed a serious problem with EBay. by F�an�ro · · Score: 4, Informative
    What if eBay also had another auction type in addition to normal and Buy It Now ones: silent auctions. It tells you when it ends, the seller may optionally give a reccomended amount, and you get to put in your bid, without knowing what anyone else put down. Now you'd be more compelled to put your maximum bid down.


    That is called a Vickrey auction. It has some theoretical advantages but for various reasons never caught quite on.
    (has some theoretical diasadvantages as well, such as the possibility of stable bidder cartels iirc)
  41. Re:And this is indeed a serious problem with EBay. by SydShamino · · Score: 4, Insightful

    If you're willing to do to $101, then why not put that down as your max?
    Before you put in your first bid, you should know EXACTLY how much you're willing to pay. And then you NEVER go past that amount.


    But then you lose the ability to gauge the market.

    Let's say, for example, that there is some old game on eBay that I want to buy. I really want it, and I'd personally pay $500 for one to get my hands on it. But, from the eBay past auction history, I see that they usually sell for about $100. Now I don't know about you, but if I know something usually goes for about $100, I'd rather pay about $100 and use the extra $400 on something else. (See that? I would pay up to $500, if that was what they sold for. But, since they don't, I'd prefer to pay less.) I would hate to be the person who won one for $475 when the ones the week before and the week after went for $100.

    So I put my early bid in at the average selling price, about $100. If I see the price go up to $101 and it's less than a few hours before it ends, I might bump it up to $110. That's still well below my maximum, but it's reasonable to me. If it goes up to $115, I might bump it up to $120. Or, maybe by then another one is listed, and I'll move to it. Or, I'll see that I'm bidding against 5-6 others, and so I'll pass this one up and wait for the demand to die down. I can't do any of those things if I start out with a bid of $150 - maybe I'd lose it, or maybe I'd pay $149 when five more were listed during the week - oversupplying the demand - at $100 each.

    What you suggest - bidding the absolute bank-breaking max that I might theoretically be willing to pay - would only work if A) people couldn't get friends to bump up their own auctions, and B) eBay let me, at any time, adjust downward the proxy margin I had previously placed on an item, so that I could adjust for market changes, without any penalty like those associated with withdrawing bids.

    (Why don't I just snipe? I rarely remember to go back and check the items at the exact time of closing.)

    --
    It doesn't hurt to be nice.
  42. Last Post! by The_Pey · · Score: 4, Funny

    Regarding eBay sniping...

    LAST POST!!!


    What do you mean, someone posted after me?

    Damn.

    --
    Hmmm...
  43. Re:The problem with sniping... by Lactoso · · Score: 4, Informative
    With all due respect gatesvp, I'm having some trouble understanding your reasoning.

    You're stating that sniping is worse for you than using eBay's proxy bidding (when you place your max bid up front and let eBay dispense the increases as necessary)? I can't think of a single possible scenario (assuming no outages, early endings, etc..) where placing a bid earlier (and thusly, announcing your intentions to all possible competitors) is better than placing a bid as late in the game as possible.

    And that's not even considering the fact that the majority of snipers use automated sniping sites (www.esnipe.com and www.auctionsniper.com for example), that allow you to set up your bid ahead of time, JUST LIKE EBAY, except you're not locked into it. You can go back and review it, edit it or cancel it up to 5 minutes before the end of the auction. You can't do that with eBay proxy bidding. Once you've placed your eBay proxy bid, you're locked in (except for retracting your bid which is a no-no).

    Better yet, the two aforementioned sniping sites allow you to group a collection of bids together in 'bid groups' so that you can try sniping multiple similar auctions and once one of them wins, the other bids will automatically be cancelled.

    Here's an excellent resource for sniping information which will be of benefit to anyone looking for logical arguments and reasons for sniping and not illogical, flawed reasons not to.

  44. Re:And this is indeed a serious problem with EBay. by Anonymous Coward · · Score: 5, Insightful

    Sniping only works if everyone else is sniping.

    Au contraire. Regarding the final price, sniping only works if there are non-rational bidders. Rational bidders bid once and put in their (current) true maximum bid. Intelligent rational people do so at the last minute. If there are only rational bidders, sniping still provides a small advantage because you don't commit to an auction and can always switch to a different auction. But if there are also irrational bidders, the type of people who think that the maximum is a number that can be increased if necessary, then sniping also likely results in a lower price. Since the behaviour of these people depends on the other bids, not putting in your bid until right before the end means that you don't contribute to the amount that they're willing to pay. Since Ebay auctions are second-price auctions, their price is the price you're going to pay (unless another rational person outbids them), and every dollar that they bid lower is a dollar you save if you win the auction.

  45. Wrong optimization problem by David+Jao · · Score: 5, Insightful
    I used to be completely perplexed by the sniping phenomenon, but after a bunch of auctions, late night discussions with friends, and a microeconomics class, I've come to realize why sniping works so well. The point is that there's a big difference between a one-time auction participant and a user who repeatedly participates in many auctions.

    For many regular users of ebay, the purpose of ebay auctions is not to maximize economic profit on one single auction. The purpose is to maximize total economic profit across many dozens of auctions conducted over a long period of time. When you are a repeat participant, it can make sense to adopt a strategy which often leaves money on the table, as long as the same strategy has a small probability of winning a lot of money.

    The effectiveness of sniping cannot be explained in purely economic terms; one needs a smattering of game theory. In pure economic terms, your strategy of always bidding your maximum leads to minimal risk: either you win the auction and pay less than your maximum, thus profiting the difference, or you lose the auction and do nothing. Obviously, under your strategy, you would always prefer to win the auction, since this is the only scenario that leads to profit. The problem with this strategy is that you are less likely to win the auction if you place your bid first, because

    1. Information is asymmetric: by revealing your bid first, you give other participants more information, and more information always helps their strategy (yes I realize eBay hides your true maximum, but nevertheless your bid leaks information -- if nothing else it leaks the information that you are participating);
    2. Other participants are irrational: The presence of your bid actually causes other people to bid higher than they otherwise would, for various unfathomable reasons which have no grounding in logic.
    Because the impact of these problems (especially 2) is somewhat unpredictable and random, the bidding process resembles a type of prisoners dilemma, in which per-instance profit-maximizing play is often not long-term optimal. What makes eBay profitable for repeat buyers is the prospect of winning a small number of auctions at prices far far below the true worth of the items. The sniping strategy is the only way in practice to win an auction at a price dramatically below the true worth of the item, because if you bid your maximum at the outset then the other participants will respond (irrationally) in a manner that raises the winning price. In fact, ironically, the information asymmetry problem exacerbates the irrational bid-raising problem under the eBay auction model, since under this auction model one's true maximum represents a crucial piece of hidden information, and the only way to find out this information is to place bids yourself until you exceed someone else's maximum.

    For a repeat participant, it is rational and profitable to take the risk of losing (say) 10 auctions each at a price within $10 under the true worth of the item, in order to have a 1 in 10 chance of winning one of those auctions at a price $100 less than true value. Unless eBay changes their auction rules, sniping is and will remain the best way to maximize expected earnings across a large number of auctions.

    If all of this doesn't convince you, then maybe the information asymmetry argument alluded to above will convince you. Since placing a bid reveals information to the other participants, you are always better off placing your bid as late as possible in order to minimize the information available to competing bidders. Doing so certainly never hurts you (if we ignore for the moment eBay's tiebreaker rules, whose effects are negligible, since the costs imposed by bidding second are less than the transaction costs of the sale), and it can sometimes help you if the other participants are irrational, which they are.

  46. Re:And this is indeed a serious problem with EBay. by technothrasher · · Score: 5, Insightful
    Sure you'll win it. If you decide you want to pay $20 and bid $20 early on, your bid has priority over someone else who bids $20 or less later.

    Ok, let's say I feel like paying $20 and bid $20 early. Then some newbie retard (ebay is full of them) comes and says, "Hmm, that guy thinks it's worth $20, so I'll pay $25". Ok, I've now just lost the item. Alternatively, nobody bids on it and newbie retard says, "I dunno, I guess I'll bid $10, since maybe I'll get it real cheap". At the last second I can then come along and snipe my $20, and win the item. Same $20 top bid, but I lose on the first auction and win on the second.

  47. Re:And this is indeed a serious problem with EBay. by FirienFirien · · Score: 4, Insightful

    What? No. If I will pay up to $100 for an item on eBay, but the current bid is $10, then I'll enter $100. My bid will show as $12 or whatever minimum increment it is. If someone bids $20, my $100 bid trumps them and becomes listed as $22. If someone snipes in the last second at $50, I'll win the bid with $52 - without having had to pay any attention to the auction past my original bide. If someone snipes $102 in the last second, then they're paying more than I was willing to pay for the item anyway, and so should win the auction.

    Why on earth do people bid over and over again, or wake up at a specific time? The eBay system is set up so you can put down the single bid you are willing to pay for an item. The automatic system does it for you. It doesn't show anyone what your maximum amount is; in fact the system is set up to the advantage of the buyer, because if I'm willing to pay $100 but the second bidder only bids $20, then the seller only gets $22 of what I was willing to pay and I keep the rest in my pocket. The problem with eBay is that people treat it as a conventional bid, believing for some reason that you should bid over and over again, just above the opposition. This is actually bad for the buyer, because it tends to draw people into bidding higher than they would originally peg as their maximum.

    If you use the system as it is designed, then you cannot be "sniped". You can be outbid by someone who was willing to pay more than you, and it doesn't actually matter whether that happens a second after you bid or a second before the auction closes. If you're outbid, then someone was willing to pay more than you were; simple. However the masses simply do not comprehend this and continue bidding by the rules from another system, which are simply wrong here.

    Sniping works against those who don't understand eBay.

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    Browsing with +2 to insightful posts and a higher threshold makes the average post seen seem a lot more ingenious
  48. Re:And this is indeed a serious problem with EBay. by Anonymous Coward · · Score: 5, Insightful
    Every buyer with any brains at all figures out sniping is the way to go

    No.

    You just proved his point beautifully. You obviously don't understand what's going on here.

    Yes, in a perfect world, everyone would proxy bid like they're supposed to, and nobody would pay more than they're willing to pay for an item. Moreover, the person who was willing to pay the most, would win the auction.

    But that's fantasyland. In the Real World(tm), there are two reasons why you should always snipe to get the best deal:
    1. You are competing against other bidders. Many of them are really, really stupid. They will see that you outbid them, even if it's above their original max price and re-bid to beat you. If their proxy still beats you, guess what. They'll bid again. It's not about you, the so-called intelligent bidder, getting caught up in the emotion of the bidding war. It's about making sure your competition doesn't have the opportunity to get caught up in the emotion of the bidding war.

      Example: your max bid on an item is $50. DumbJoe has already bid $30, hoping he'll get it for that. You come along and bid your $50 well before the auction ends. The new high bid is set at $31 by eBay's system. DumbJoe is notified that he's been outbid, so in the heat of the moment, he comes in and bids $40. Again, your proxy outbids him up to $41. DumbJoe decides he's not going to let you beat him, so bids $51. Oops, you lose!

      Now, let's redo that with sniping. DumbJoe sits as the high bidder at $30 until about 20 seconds are left in the auction. At that time, you place your $50 bid. Price goes up to $31, auction ends, DumbJoe has no time to get caught up in the bidding war. You get the item, and at a damn good price, too.
    2. The other scenario where sniping is a must is when many sellers are offering the same item. Because of the emotional bidding war phenomenon, some of these auctions will inexplicably get many bids and end up with rather high prices. Others will go for much lower prices, and some may not even sell at all!

      Let's say many sellers are offering the item you wanted for a max of $50. You bid on the auction that DumbJoe is bidding, and he gets into his emotional bidding war. He drives the price up to your max of $50 before giving up. You win at $50, which is what you were willing to pay. No problem, right? WRONG.

      Meanwhile, another auction ends a few hours later, selling the exact same item for $32. Oops! You could have saved $15-20 by either sniping on DumbJoe's auction, or deciding that its price had gone out of line with what the market was paying on other auctions for the same thing. You could take your time and wait for a relatively low-priced auction about ready to end and snipe that. The savings could be substantially below what your maximum price is.

    Moral of the story: ALWAYS snipe. Lots of dumbass snipe because they don't understand the proxy bid system. Other dumbasses don't snipe because they don't understand their competition.
  49. Re:And this is indeed a serious problem with EBay. by SharpFang · · Score: 5, Insightful

    What? No. If I will pay up to $100 for an item on eBay, but the current bid is $10, then I'll enter $100. My bid will show as $12 or whatever minimum increment it is. If someone bids $20, my $100 bid trumps them and becomes listed as $22. If someone snipes in the last second at $50, I'll win the bid with $52

    You bid $100. It shows as $12. A stupid kid comes along, and bids $15. Your bid goes to $17. The kid bids $20. Your bid shows up as $22. After a while the kid bids $80 and your bid shows up as $85. You win and get to pay $85. Or the kid bids $105 and you don't get the item.

    Now if you set up a snipe shot of $100 for that auction, the same kid comes along, bids $15 and leaves happily seeing his bid the highest. You win the auction and get the item for $17.

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