FWIW... I bought a pricey Nikkor lens from KEH a couple years ago. It arrived the the faintest whisps of cleaning marks in the front coatings that were not in the description. These were not enough to affect image quality in any way but did affect lens value. They refused a partial refund but allowed a return with a complete refund of the purchase price. I was out the cost of shipping and, in retrospect, I might as well have kept the lens. The bottom line is they did back their product. In years past... many years past... I bought other items from them at competitive prices with no issues what-so-ever and customer service was great.