Ive seen some cheap R33 GTR's, costing between 23-27 grand. One of em was a V-spec too. i thought to myself, "Whoa, thats cheap. I should buy that". Then i thought, "hang on, why the hell is it so cheap?". Im not saying these cars were duds, but who knows? Go on the general condition of the car. Who has previously owned it? Someone young or old?(I take this into account very much so!) Did they look after it? If the car may have had a rebuild, do they have receipts to prove it? your pretty much on the ball with this one.
IT may seem a little daunting with all these things you have to consider, but the R32 GTR is an awesome car and i wouldnt want to discourage you from owning the true Godzilla. Im planning on keeping mine forever till i die, and if my future wife tells me to get rid of it, she can get the f*&k out the door! and im dead serious.