That's a bummer. I looked at using an escrow account, it's expensive but may be worth peace of mind. I also like to talk on the phone with the buyer, verify their address, and verify the origin of the gear with the dealer and or manufacturer. I got screwed big time on a used car once so I am naturally a paranoid android.
I'd go after him until you think that the probability of success outweighs the effort, sounds like you will soon find out a lot more.