I've been around these forums for a while. I mostly just read and trade. I don't post much.
I feel I've learned scammer behavior quite easily, as it's pretty predictable.
Forum user Lecture was selling some 800 point microsoft cards for slightly under market value. Link :
https://bitcointalk.org/index.php?topic=210347.0 I offered even less (lowballed him) and he instantly accepted. Okay, great deal...
I then realized he was someone that literally just reigstered, so I asked him to either go first, or use escrow. Boom silence, after seeing him log in and out after that message.
I then went through his previous posts, He is attempting to sell stuff without escrow (someone even complained about him not accepting escrow), and has even took out a BTC loan from somebody.
Come on guys, there's red flags all over this. I hope it turns out he's not a scammer and he didn't get anyone (lecture if you are legit I apologize), but I just thought I'd point out the obvious before people deal with him and take realistic precautions before you just hand someone money.