This is like the fourth time I've heard someone say they were scammed by thebeardedjet. Seriously, if you're scammed, get these tools banned. Get pics of their MSN (proof it is their MSN over Sythe/PM), them saying their RSN over MSN, your inventory before trading the gold, the 2nd trade screen waiting for the other player to accept (with said RSN), your inventory after the trade (less gp), and all other important chat logs. But like others said, always use an MM. Even if the trade is small, and you don't want to pay fees for OMM, there are plenty of other trusted MMs here.