Good post, okay well:
Wwith these imports there is no way you can track the history of the vehicle when it was in Japan. I did a RACQ master check on mine ($290) and got 7 pages of very good info but nothing comes back with the history in Japan unfortunately. If you are good around cars you can physically check all the panels and look for things missing or weird sounds when it drives.
When you drive the car, check EVERYTHING, disregard the owner is in the car with you. Turn the radio off, listen for rattles or anything that doesn't sound right and BE SURE to bring it up with the seller. "That doesn't sound right what's that?" make sure they give you a good answer.
If you get the vehicle inspected and the customer denies this to be done, WALK AWAY.
Repairs & Servicing... DON'T GO TO NISSAN, they will charge you an arm and a leg for ANYTHING and EVERYTHING. Source parts you need from Japan and do it yourself if you have to, or build a relationship with a good mechanic that knows Imports. There isn't a great deal of mechanics that know V35's well so be careful.
$14,500 seems like a good deal to me, is the car bone stock?
Throw a price at the owner, say $13,000 and look for a reaction. If it's blunt, explain to the owner the faults in the vehicle (if any) to justify your offer. All they can say is no right?
Definitely worth getting the car checked, i'd never buy a vehicle without getting it fully checked by a qualified mechanic.
Goodluck with the purchase!