Many don't realize that you can actually block particular bidders from bidding on your eBay auctions. Have you had trouble with deadbeat bidders, or bidders who take too long to pay? You can simply add them to your Blocked Bidders list, meaning that they will be unable to bid on any of your auctions until you remove them from that list.

From your My eBay Seller's page, scroll to the bottom and you will see a link for the Blocked Bidder list. Click on the link, and you will be allowed to block certain usernames from bidding on your auctions. If you want to block more than one person, use a comma between each username.

If your deadbeat comes through and you want to allow that person to bid on your auctions again, you just have to go back and remove the username from your list. The changes will take effect and that person should be eligible to bid on your auctions again, as long as the are still in good standing with eBay.