Naturally, it's not worth much. I picked one up at one of the used camera shows few months ago for $40, but can't really use it, at least not on the Canon. After acquiring the NEX-5, I have plans to convert it to a "normal" lens with focusing helicoid.
To test it out, I held the lens to the NEX-5's mount, and took a few shots at f1.3. As expected, contrast is pretty low wide open, but not unusable, if you can nail the focus at f1.3 with a lens detached from the body while trying to focus! I think it's a rather interesting lens for portraiture with such low contrast, and even a bit of luminous quality at f1.3.
I can't wait until I can make this into a proper lens with a focusing ring, and shoot some pictures at lower ISO.
ILEX 80mm f1.3 and Wollensak 75mm f1.9 on the left. Click to enlarge
William -- NEX-5 & ILEX 80mm f1.3 @ f1.3