used M3 cams go for about 300-400 USD... I'm selling a set as well with very low milage for 500 CND.
What's the story with this motor? why is it being parted out? was it over revved?
FYI, the 3.2 crank will work on single Vanos 2.8L engines turnig it into a 3.0L stroker. but I would not recommend using 3.2 rods. Arrow or Pauter instead.