Scrounging for Fun and Profit
Guinnessy writes: "According to Toni Feder on Physics Today, scrounging used equipment is worthwhile if you can avoid the pitfalls of wasting time and compromising scientific goals. Feder interviews experimenters who have dug up everything from dewars to nuclear reactors."
When I was in high school me and a buddy of mine helped the chemistry department head "inventory" the stock during a big move. We got everything under the sun. Unfortunately, we found out that some of the containers were mislabelled, and nearly blew our heads off opening a can of ether.
Just a warning that scrounging isn't risk-free.