Keh repairs cameras and sells used equipment. I have purchased many items from them and have found them to be extremely reliable. Packaging was good. Everything arrived in good shape and in the condition stated. I don't think I have purchased anything they rate as UG (ugly). Nor have I purchased NEW or LN (like new). I usually purchase items rated EX (excellent) or EX+ (excellent +)
The only disagreement I have with Tao's suggestions above is that one can read into it an inference that a macro lens is only "useful for doing a large amount of macro work." A macro lens focuses from very close to infinity. Macro usually means tiny things like insects to more people. But "near macro" can be larger objects such as flowers. A "macro" lens can be used to shoot landscapes and portraits and flowers as well as insects. Your 24-85 kit lens already contains a 60mm setting. Anything you would now photograph at that 60mm setting can be photographed with a 60mm macro lens. That is why I referred to it as a lens which can do "double duty."