Bit naughty really, the buyer may well have missed out on another similar item bidding on yours, as said, ebay gone down the pan by peeps not playing the game.
You could (as this seems the case) say that you are not willing to do the deal with them as you requested contact before bidding, and that the seller is abroad so you are unlikely to be able to track them if someone goes amiss, therefore with so many scammers your not willing to take the chance of being ripped off.
He may leave neg feedback, but anyone reading will most likely sidfe with you,