The short answer is no. Once you place a bid on an item, you're locked into paying for it if you win the auction. Make sure you are always willing to pay what you say you will and that you seriously consider any purchases before bidding. Some auctions might get outrageous as far as what people are willing to pay, so be sure not to get caught up in the action if you don't have the funds to pay for an item. If you do find yourself unable to buy what you've won in an auction, it is best to contact the seller and ask if they will cancel the transaction and either re-list the item or offer it to another bidder.