I know a guy who owned one before (E30 M3). He said that the E30 is one of the best BMW platforms and its quite easy to maintain he added (i dont know if this includes the M Version).

I could give you his contact info if you want to ask some Q's.

He sold his E30 M3 for an '98 S14 200SX/Silvia m/t (one of the two in the PI, the rest are a/t's).

BTW, you need someone to accompany you on the test drive? hehehe... :P