30GB 4th gen that I found in the snow one morning while walking to work. It looked like it had been there over the weekend and I was pretty surprised when after thawing out, it worked fine. I felt like trying to find out who owned it, but then I noticed it was filled with Snoop Dog and Bone Thugs n Harmony. I felt like I was doing a service by restoring it to factory defaults. 😛
I've since then bought an 80GB Classic, 2GB Shuffle, and 16GB iPhone.