Look, what I got from eBay!
I got two of these along with fitting polarizer filters for ~ 40 € (~ 55 USD), which is quite cheap compared to the price these lenses generally sell for (new as well as used). I guess I just was lucky The adapter is from amazon marketplace for ~ 25 € (~ 34 USD – from meinfoto Berlin, for those who live in Germany). Quite a bargain, huh?
I am having a great deal of fun with this lens. It renders beautifully, vignetting is only very slight up to f/8 and the bokeh is … well, special, as with most C-mount lenses. When I find the time, I will write a review about this lens and also post some pictures showing the formidable output it gives.