He had two other users that provided him with good feedback:
https://caguns.net/members/hkenthusiast.19160/ and
https://caguns.net/members/spartanchainer.10092/
Personally, I would contact them and get whatever details you can about their transactions with him. I suppose those reviews could be from sock puppets but, it seems unlikely.
Also, how did you pay? I wonder if you might have some recourse through the processor. For example, if you used Paypal and paid with a credit card, the credit card company would indemnify you against this kind of a scam. Contact your CC company and file a dispute. Also did you get his phone number, address, full name, etc? Depending upon how much you sent him you might have some legal remedies available to you.