900RR rear rim with axle, cush drive, I think a 525 rear sprocket, and mounted and balanced Pilot Power with more than 80% tread (about 4k+ miles left the way I ride) for $250. Just the rim and that stuff no tire are going for $125+ on ebay.
900RR rear caliper mount, caliper, and rotor for $50. I did not do the modification to the caliper mount that 9nineteen did to make it work yet.
CBR600F3 front rim, 10 button rotors (the good ones!), and a mounted and balanced Pilot power with 90%+ (at least 10k miles left and again, the way I ride) tread for $400.
Pazzo shorty levers, black with red switches $130. (left lever has a few little scratches on the very end, but I fixed it with some black model paint).
Both rims were used so they have some scratches, but no bends or any structural damage. I was planning on powder coating them, but never got around to it.
Just remember that all of these mods add at least 5hp each