Cashing Out of Bid Coins

V set up a local bid coins account for cash and mail. When he was selling big coins, he was charging a small fee to make the trade. But now, what he set up is, when people send him cash in the mail, as soon as he gets it, he would log into his big coine wallet and transfer the bitcoin to the person who just bought it. Eventually, though, i got discrunted with that, because i got a little paranoid. I found trader who on, i was doing cash and mail with them. And they were very consistent. And eventually a message to themand i saw where their return address was. And the return address happened to be