so i have now narrowed it down to 4 cars:
Ok Choosing between these cars E90 sedans:
All cars have Nav, MTech, Premium, moonroof, cold weather, enhanced sound, 6spd tranny
2008 Interlagos/Black leather
2009 Interlagos Blue/black leather
not sure about inservice (CarMax car)
1/2010 inservice date
Ideally, I want a 2009+ car because of the newer Idrive and LED taillights, but they command a premium and there aren't many out there. This is going to be purely a weekend car, driven 6k miles a year in Manhattan.
I can reasonably afford to get any of them but i wanted to stay under 50k, but to me it seems the first one is the "best deal".