I'm a lurker on this board, but like many I've been following the posts by and concerning Mark Sutton.

Here is one suggestion:

If you want to eliminate your chances of not having to deal with him on ebay, you can block him from bidding on your auctions. Go to this link - http://pages.ebay.com/services/buyandsell/biddermanagement.html. His ebay name is stardustsonny.