Here is what I would do. Go to the police that is in your district, have the cops call him. He will answer, or will return the call after they left him a message. I did that when I got scam by a shop.
+1. Its cool and interesting to do your own PI work to find the guy, but then what are you going to do when you get him? If you so much as punch him when you find him, then you're the bad guy.
Go to the PD, bring documentation of the fake items he sold you, as well as the ad with the false advertising, and you may be able to get police assistance.
Sadly enough, you did consent to the purchase of the items, even if they were falsely advertised. Craigslist is craigslist. I've gotten burned and I'm sure many others have. Sadly 9 times out of 10, you can't do anything but "charge it to experience".