Lol, at first when you said 50g I thought you meant 50 grande. But yea, I feel sorry for you making that mistake. I have friends who have also made it. That being said, people don't put stacks of linen up on the AH so they can send the money back, they do it to catch out people playing late at night and/or drunk who don't read it properly so they can make some easy coin. Don't hold your breath waiting on a reply.

Tbh, go troll some forums, he probably posted up a screenie of your mail and titled a thread "lol, check out the noob who can't read bid prices!"