dude i no the costs of all these items, and they still dont add up to anywhere what his asking for this car, you can get a set of r34 brembo brakes which shit all over the the 32-33 ones, for 3.5k fully rebuilt with new pads and rotors, the N1 r33 engine.... why would you bother when u can build a fully forgie bottem end for same price if not cheaper... and r34 gtr N1 turbos you can get brand new for 2.5k they are just a -7 or -9 one or the other.
So really the parts used are not rare or a really big deal..... Sorry to be blunt man