When an item you want goes up for bid, it will usually start low and the auctioneer will raise the bid amount every time someone bids. This will continue until there are no more bids on that item, at which time they will sell the item to the highest bidder. You can expect to pay a buyers premium (10-20 % added to the final price) on all items you have won.  The buyers premium may vary slightly depending on the type of auction.