I acquired the 600mm f4 lens at a insurance salvage sale. The auto focus had problems when I attempted to use the lens so I sent it into Canon for repair. The total repair cost for the lens was $1813.47 and the lens works well now. What's included: 600mm f/4 IS USM lens 52mm Drop-in Screw Filter Holder 52 (accepts standard 52mm filters) Lens Hood - has a crack on the outside but still intact Extender EF 1.4x II - Fair condition What's NOT included: Foot for tripod attachment Lens cap Asking for $4900 shipped in ConUS. Includes shipping and PayPal fee. Price negotiable. I can provide all repair documentation with the lens. Feel free to contact me for any questions and/or pictures if you are interested.