This would explain why he scammed for as little as BTC0.02 on this thread: https://bitcointalk.org/index.php?topic=1016191.0
It seems from the beginning he planned to get a reasonable amount of trust just to commit several scams at the same time :/
I'm sorry to say there's no hope for you to get your money back.

I guess when you deal he didn't have any negative feedback yet? https://bitcointalk.org/index.php?action=trust;u=406984
Regardless of that you should always use a trusted escrow.