As I've posted before....
http://www.trollhunters.com
When I used to buy/sell/trade back in 1998 on
http://forums.anandtech.com a guy named Roger got scammed, and he took it upon himself to personally hunt down every troll that scammed anyone in that forum.
The website was created and is there for anyone who needs help tracking down a scammer and getting your money back. I strongly urge Joshua to visit the site, contact someone there, and get some help. They know the laws that can help you bring this jerk down.
If you don't stop this guy he's just going to continue scamming. He may even come back here with a new IP and username and scam someone else in our own community.
Again I state I'm sorry I was right about this guy :( It's really a shame that people like this exist. Lets just make sure he doesn't come back