As it only finished last night, and the guy has included a picture of himself in the listing, which would appear in itself daft if he were trying a scam, and I assume you have not parted with any cash, can I enquire as to why it's already turning into a legal case.
I know it could be disappointing that he may have decided not to sell after having allowed it to run to the end on Ebay, and that in itself means he has broken his contract and could be guilty of breaching Ebay rules, but I would have thought that unless you've paid any cash that it wouldn't be worth the worry & hassle to pursue it further, or have I missed something?