I would pass on any M car out of warranty. My friend leased an 09 M5 and he's glad that he didn't buy it. The car had all sorts of little electrical issues last year. Had he bought it and had it been out of warranty he would be spending some serious cash to get it all fixed. We feel bad for who ever buys this thing now.
Space Gray 2011 335xi E92
Old: Jet Black 2007 E90 (with xenons
and modded) 328i