I've bought a number of used lenses from KEH and sold to them as well. Never had a negative experience.

I'm a retiree who enjoys photography as a hobby. Nikon shooter with too much stuff -- the curse of a curious gear-head. [grin] I'm on the forum almost daily, but I don't talk much, so I never got around to posting an introduction. That's bad manners of me, because I owe a 'thank-you' for the knowledge and experience you've all shared.