Look, here's the thing... Have you proven to anyone that you hadn't claimed that your set is an AP set? There must be some misunderstanding between you and your buyer. Try talking to your buyer instead of complaining here and there and if you both can't come into peace, just return him the money and have your AP set back. Isn't that simple? And as for our moderator, I believe Apis isn't a bias person at all. I don't know about the rest but he definitely had helped me on my case. Show some proof before you write a dispute on somebody.