This is a preliminary list of Websites where you can bid on government property. Bidding is free and easy. If you are gonna bid on military stuff though... I suggest you know how you're going to get it home (boats, missile silos, tanks, etc. :)
Bid4Assets.com: An assortment of various Federal and State Agency Items at Auction. One of the more popular ones.
U.S. Department of the Treasury: They've got nice Electronics. But mainly a lot of things that you wonder where the Treasury Department got them from. This years auction is in New Jersey
GoveSales.gov: Part of the General Services Administration. Looks like a lot of pages link to other government sites. Very redundant.
GSAAuctions.gov: This is my favorite Government Auction Site. They have all the best stuff that most cannot afford, and a few things that everyone can. This is where pilots can get their first craft CHEAP! Only share this site with your FAVORITE people, it's still somewhat of a secret.
USDOJ.gov: U.S. Marshals Seized Cars and Vehicles