I've always been fascinated with the 32X ever since I got mine when stores were clearing them out, some time in the mid-late 90s. I recently got a complete boxed copy of Zaxxon's Motherbase 2000 in really good condition. I haven't been able to play it yet though, because I don't currently have an easy way to play Genesis/32X games. I have a pretty decent selection of 32X games though, and I even have 5 boxed ones.
btw, I have Mortal Kombat II for 32X, and it seems like a pretty half-assed port. There's hardly any difference between it and the Genesis version.