I Yan I

Link to scammer's Sythe profile: http://www.sythe.org/member.php?u=248293
Briefly explain the trade: I was buying a RS membership pin for 5$ via Paypal.
How they scammed: They attempted to sell me an invalid pin.
Proof that you were not talking to an impostor: See Below
Trade screenshots:

http://img153.imageshack.us/img153/1443/failpinseller.png
http://img163.imageshack.us/img163/2306/failpinseller2.png

P.S - I'm assuming that 'the attempt to sell an invalid product' is considered scamming.

 

That's not enough proof as you could've used the pin already and you haven't shown the entire convo.