As you can see by the posts in this thread, the modifications on your car are polarizing. You may find the perfect buyer who appreciates the style (and is willing to pay you for it). You will certainly appeal to more buyers if you tone it down and revert to a more stock look.
'08 E90 M3 - Alpine White - Sold
'13 E92 M3 - Silverstone II - Sold
'04 E46 M3 - Jet Black - BBS E88, KW Clubsports, Brembo BBK, SuperSprint Exhaust