KEH is a much better choice than eBay for selection of lenses and confidence in the transaction. As mentioned, they are conservative in their ratings and the lens you will receive will likely be in better condition than you anticipated. They ship promptly. Their price may not be the lowest you can find, but in over a half dozen purchases from them, I have never been disappointed in what I received.
Buy direct from their web site, not through an Amazon listing. Pay attention to the description so you know exactly what is included with the lens.