I have the above lens in excellent condition. It has a few small scratches on the body and hood but is otherwise superb. Glass clean- no haze, fungus, or appreciable internal dust. Aperture blades snappy. Ships w/ original box, caps, and soft case. I will also include a tripod mount that I built for this lens for free- it doesn't scratch the body, and allows camera rotation. The price is low, because I need the $!! Paypal or money order preferred. PM me w/ questions.
Just screw the tripod mounting plate into the base of the wooden mount, and you're ready to go. I used it several times, and the balance is quite good with a k10d.
I added some pics of the tripod mounted lens w/ k10d. I know that many people seek the F* 300, because of its built in mount. This mount more than adequately addresses this issue and is easily installed/removed.