The auctioneer will first power up the game to show that it is indeed operational and is worth bidding on. Then the fun begins. If nobody accepts this bid, he will lower the opening bid until someone accepts his offer. He will then slowly raise the price as other customers show interest in the item. As the price rises past the personal limits of the various bidders, the bidders stop bidding.
Bidding then proceeds to the next item.
Sounds like fun. Okay, I've found an auction. The most important item to bring is an extension cord. Preferably 100' or more, with multiple plugs. A good solution is a self-dispensing spool of cord with four outlets in the center.