I'm so sorry. You should write him a really angsty letter and make him hurt. I suppose now is too late to refund the tickets? If you purchased with a credit card, you could try a chargeback.

Also, you can sell the tickets online. As long as you don't ask over the purchase price, you're in the clear. Unless of course you want to ask for more. In that case, sell something small and stupid with bonus tickets. That's how the scalpers do it for football games at Ole Miss. People buy "I *heart* Col. Reb" stickers for a few hundred dollars and get bonus tickets to the game. But only if you're crafty.