You can find out when Treasury securities will be auctioned by viewing the recent announcements of pending auctions. Once an auction is announced, your institution may submit a bid for the security. You may bid directly through TreasuryDirect (except for Cash Management Bills), TAAPS (with an established account), or you can make arrangements to purchase securities through a broker, dealer, or financial institution.
It is important to have realistic expectations when attending a government car auction. While you can find some good bargains, you are not going to find a brand new BMW for $100.00. Government auctions sell both fleet cars and vehicles that have been impounded by government agencies. The conditions of these vehicles can range from great to not running. Set your expectations and budget realistically.