I got scammed

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This is the c✿✿✿ that scammed me what should I do? Claimed he had a YouTube channel (thespycrap) and it has 16000 subs, he also had a previous name (thespycrap) so I assumed he was telling the truth, next he asks to borrow a couple hats for the video and I said ok, he says he'll give it back, he then sends a trade offer and I accept then he proceeds to unfriend me, block me, and and changed his name! any help would be greatly appreciated!

Be sure to screenshot the conversation you had with him (if you have it), then submit a report here: http://forums.steamrep.com/forms/scam-report.2/respond