Rocker arm-probably 750 or so... flaking rockers are a known issue w/ 748's
2 new tires w/ install-350
Brake rotor-300 or so
belt change is around 350 or so...
ECU change was probably to accomodate the pipe/ad hp and is around 2k with the dyno time...
Plus the other stuff.
So no, not ripped off, but Ducs can be stupid expensive.
And its still "just" a 748.