$650 for the lovely 4 into 1 exhaust system on my 400f, headers to muffler. Insanely expensive (and why, anyway!), but will look absolutely brilliant once mounted on my freshly painted motor!
Handlebar controls seem pricey too. NOS from $75 per side. These are only switches folks, for for that price, none too reliable, I should say.
While I'm carping, my oversize pistons were $250. That seems like alot for 4 shot glass sized poppers!