He's gone by various aliases over the years, "cafedeparis" and a few others. His prices are high and his descriptions should be read with caution, but if he has something you want, it might be worth watching for a while. He'll usually relist things at a lower price if they don't sell, so if they generally fall into your price range, and there seems to be enough margin for error in the description that you are likely to be satisfied with the condition of the item, then it could be worth buying something from him. I think I've purchased two lenses from him.