How does a Silent Auction Work?

Tables are set u[ with the items that are going to be bidded on. If the items are to large for the table, normally a picture is placed. Bidders go to each table and write down a bid for the item they like when the auction begins. At final call for bids, people can go back through the items and put in another bid if they like. Once the auction closes, the highest bidder gets an index card with the amount they need to pay for the item.