I have had excellent luck with keh. I just purchased a canon FD 85mm f1.2L from them in ex condition. It looks like it just came out of the box. I have also purchased mf lenses from them that had manual shutters built into the lense for my rb67 with great luck. In fact I jsut had a lense delivered, and I listened to the shutter and i could hear that it was off. I was going to use it for my cousins wedding, I called keh and explained the problem. They overnighted me another lense that worked flawless no extra charge and had me send back the other lens via ground. I have never had a problem buying equipment from KEH.