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I bought this lens on eBay without realizing it was a screwmount (my fault). I'm not interested in using an adapter at this time, so I have not tried it on a camera. I used to have the same lens in Canon FD mount and was very pleased with it.
The aperture appears snappy when I use the pin to stop it down. The focus action is nice and smooth. The glass is clean and scratch-free. There is one internal dust speck that I can see, which unfortunately didn't show up in the photograph above. Externally, the lens shows only normal wear, with some residue from the removal of one of those gold oval inspection stickers (just visible near the top of the photo). The built-in lens hood offers a good amount of friction (it does not lock into place, but I don't think it's supposed to). Front and rear caps are included.
$35 shipped within the United States. Will consider shipping outside the country, to people with a track record here (US$30 + actual shipping costs).
Thanks for looking.