I've always had positive experiences except when I sold an A2630 accelerator to 23703james. I had tested it before shipping and it worked fine. It was sold as-is, no warranty however.
He got it and said it didn't work but I was out of town and didn't respond to his message until the next day. He already left me negative feedback ( my first negative) before even talking to me. I ended up refunding all his money even though I didn't have to and the best we could do was remove feedback but in my opinion that looks about as bad as negative. I also let him keep the card. I keep wondering if I'll see that card for sale on ebay though since I know it was working before shipping and I tend to over-package.
