This is off topic about this scammer, but I had to tell you guys about it. The forum I mentioned above had a guy sell a CPU to someone. The scammer sends him a check for $5k or something like that. He tells the guy to take the money out for the CPU and some extra money for his time. He is suppose to deposit the check and send the scammer back the difference. The check clears and the person is suppose to send the rest back. Once they find out the check was a fake, the seller has already sent back the difference and is screwed. A guy posted about this knowing it was a scam and decided to mess with the guy. He had him send another check making up a story as to why he needed another. Last I checked the scam didn't go forward and the scammer didn't respond. Link below, good read.
http://forums.anandtech.com/showthread.php?t=2231102
http://forums.anandtech.com/showthread.php?t=2231102