Hey, I have an A-mode Sigma 28mm f/2.8 "Mini-Wide II" manual focus lens which I'd be willing to let go. I really like the lens, but never carry with me, as I also have a takumar 28 which is superb, and a Sigma 24/2.8 which I also love. I have some example shots up
here.
I'd be willing to sell the lens for $60 plus whatever shipping to your location, but I have to leave town for a couple weeks at about six tomorrow morning, so I wouldn't be able to sell it to you for a couple of weeks. As far as I remember, the lens elements are flawless, and although the focus ring has a small amount of play, it doesn't seem to affect image quality or focusing. The aperture blades are dry and snappy, and everything was in great working order last time I shot with it a couple months ago.
I also have this lenses little brother the Sigma 24mm f/2.8 Super-Wide, and it stays on the camera most of the time... great lenses. (If you'd like to see examples with the 24mm,
look here, but I don't know why I'm talking about it 'cause it's not for sale - they do share image characteristics though).
If you're interested, I'll give you a more in depth description and pics of the lens in a couple weeks.