alrighty, here is some real info,
A R32 GTR will be between 15-20g's for you, GTS-t will probably be 10-15, maybe cheaper if your lucky. The km will actually be around 80-120 depending, and you will most likely have some minor body stuff to deal with, or dumb things like ripped seat bolsters, no radio etc. You will have to do some basic upkeep things to get it ready, and to pass an OOP which you need to register you will need to add daytime lights and some other minor shit like new brakes etc. There is no real way to tell if the car has been beat to shit or not, so use some common sense, if it has a cage and a shit load of mods, its been flogged, look for a mostly stock car, and go through a reputable dealer and you should be alright. Hope that clears some things up for you.
If you dont believe what i just said, scroll up to the pics of my car on the other page and look closely at it.