Why didn't you just keep the E92 for the time being? Rather than go through all this trouble and potentially lose money. You must have some special skill that most others don't have to order to keep buying and selling cars and consistently make money reselling. Don't hear about that happening very often...
C350 is a nice car, but it would be a significant downgrade in terms of driving experience.
Present: 2013 M3 coupe (Azurite Black, Black, Piano Black)
Past: 2010 335i coupe (Monaco Blue, Cream Beige, Grey Poplar)
+ miata nut (2004 GT/LS and 2013 GS/Club Edition)