If it isn't asking too much: What did the other party try to change?
middleman was added to the deal afterwards, and the moneypak codes of $100 sounded suspicious. Sounds like hacked codes.
Didn't you know the value of the moneypaks beforehand?
About the middleman: Forget that was supposed to be me, as it could have been someone else... I don't see a problem with it, it helps to protect both parties. Or did you have any reason to trust Liberty Payout? He doesn't have much reputation to lose, you know? lol