I added him to my blacklist - he flipped a suit purchased from me last month. I may not be able to command his prices, but I'm the one that had to flip through a hundred stafford suits to find one thing worth flipping, and I'm not interested in passing stuff to him so he can make 2-3x the profit.
He's willing to pay you your asking price for the item, don't see what is wrong with that.
That's your right to blacklist him DanM, but IMO he did nothing wrong. If he was either a) the high bidder, b) used the BIN, c) made an offer you accepted, then why should he not be able to resell it or wipe his ass with it. It's the same to you and took you the same amount of time to find it and made profit off of it.
You would rather sell it to someone for less money?