When attending an auction in the UK, it is important that you know the essential guidelines involved in successful bidding. Prior to attending a Used Car Auction, bringing along the catalog will be helpful. You can review the catalog and check for the prices of each car. Nonetheless, if the vehicle is indicated to be without reserve, then the bid amount shall begin with whoever makes the first bid. If a car is taken to be “warranted all good”, then it has no major defects, and can be returned by the bidder in case of technical problems.