Hi - I bought this CD-ROM a few months ago and no longer need it... it's only been in my computer drive a few times and looks new. It contains 170 full-color highly detailed pdf format scans of Leica brochures and other literature from 1901 - 1972... amazing stuff if you're into those great old screw-mount Leicas. Works on any PC or Mac. All you need is Adobe Acrobat (free from Adobe) to read these files. I paid forty bucks for this (I think... Marc, if you're out there, correct me if I'm wrong...) and I'd like to get some of my money back out of it. My asking price includes shipping if you live in the US. I do take Paypal, or a check or money order's fine. Email me if you have any questions at all.