I bought a used Panasonic GM1 from KEH. Cosmetically, it looked great. However, it wouldn't recognize several different SD cards that I inserted (they were recognized by my other Micro 4/3 bodies). So pretty clear they didn't test it. I called them, explained the situation, and they didn't argue with me - they immediately sent me a return label and refunded my money after they received the camera.I spoke with them on the phone, and they issued a call tag. It will be 3 weeks before I get my $ back. I asked how they let a camera with a screwed up car slot get out the door, she said sometimes they miss something. I asked how they can test a camera without putting a card in the slot.
The fact is, they didn't test this body.
She had the gall to ask me if I wanted a refund or an exchange.