Wow. People like this suck. I've heard of a few and known at least one. Too bad for you, but you must not have payed cash, so put a stop payment or declare it stolen by your CC company or paypal or something. You will get help getting it back from those places. If not, usually people leave forwarding addresses or phone numbers. Get ahold of the parents and find out where he lives, in texas and a. go there with 5 people and some weapons and park outside his house or b. find someone who will do it for you for a small fee.
good luck