RE: Off-topic: Am I wrong here?
It sounds like he will give your money back less shipping? It sounds reasonable, take what you can get. Going after the shipping company is not going to get very far.
I say reasonable since the seller spent the shipping money once to get you the wing, it isn't his fault it got messed up and shouldn't have to refund the money. Also in the US people don't usually do much without making a few $ unless they are your friend, and even then you can't be too sure. The seller most likely doesn't want to mess around going after the shipping company for the refund.