What Do Good Domain Names Sell For?

wirefarm asks: "A friend of mine has owned a good generic domain name for the better part of ten years. She and her husband have a small consulting business incorporated in that name and now a big financial company has expressed interest in their domain. It's a name in common use for hotels, bed and breakfasts, country clubs, schools, churches and probably a few towns, as well. Very generic and pleasant. Something roughly like 'hillside.com', though that's not it. Fortunately, the company is being pleasant about it and not threatening to squash them with lawyers... They've never considered selling it before and are not just trying to make a buck, but they're curious what sort of money is typically involved in this type of thing. Anyone been in this situation lately? What should they be careful about?"