Eddie, at least you can block him from bidding on your future auctions:
"If you don't want to sell to certain eBay members, you can put them on your blocked list. They then won't be able to bid on any of your items until you take them off from the list. You can block up to 1,000 people.
Here's how you add a member to your blocked list:
1. Go to the 'Blocking a bidder'.
2. Enter the User ID(s) you want to block.
3. Click 'Submit'.
To take someone off your blocked list, delete the user ID in the text box and click 'Submit'.
It's a good idea to let the eBay member know you've taken them off your blocked list. That way they know they can start bidding on your items again."