As Tim said in the M3 review issue, the E36 M3 has hit the bottom of the depreciation curve. Yesterday I picked up a 98 M3 sedan for under $6k. Techo Violet 5 speed with M- contour wheels. Leather good, everything seems to work.
PO traded it in on a new Chysler minivan. Looks like he was in the process of replacing just about everything as it has new belts, idlers, control arms, clutch, water pump, tires, brakes, Bilstein HD shocks... when I'm guessing the allure of an almost free minivan made him trade it in. (young kids and a non-understanding spouse will do that - good for me though.)
No mods planned for me but I do look forward to the challenge of maintaining a 10 year old daily driver.