You should post screenshots of the character(s) in-game before you trade with anyone, so that everyone knows that you can be trusted
And you and @macAARONii should make sure to use an official MM when making the trade.
I'm scrolling around and I see the guy tried to offer his account for $50 and the other guy agreed. Lol, the game isn't worth that much. Plus, you blindly accepted it without seeing any actual details for the account.