E36 M3 calipers, $200.
 

I have a set of E36 M3 calipers, good shape, front and rear, not painted, $200
Another sets of rears only, painted red, (but need repaint), $100.

What other hardware is required if I wanted to do an M3 brake conversion aside from the cals?

cals, rotors, pads, not sure but maybe the wheel hub.

spindles for the front, trailing arms for the rear, and a master cylinder if you're doing front and back together.

Bump!