No offense, but you guys came off a bit hard on him.
Not only as a new-comer here myself, but I've created a thread to sell some things myself as well, an individual may not be able to compete with vendors who buy in bulk.
It does come off as being rather rude when someone comes into your sales thread and is like, "DONT BUY FROM HIM, THIS SITE HAS IT FOR $2 LESS". I also would take offense as would anyone.
Sure, something used you will not get retail price for, but 10-15% margin, I would have to deem acceptable. But, it seemed like all you cool kids, you know.. the ones who got bullied in high school jumped on his back once he was on the ground and repeatedly kicked him in the back of the head. I'd say alot of the bickering and name calling back and forth was not necessary. Sure, he deleted his comments, but there's no reason to stoop to his level if that was the case.