buyers guide sent. This write-up, is for someone, that never owned a gn before. nonetheless, it should help you.
also, if youre wanting a 'get in it and go' type of car, there are some things to watch out for, that one may not remember to look over.
cracks in the A pillars or roof. misaligned doors. (they can be a real pain to fix) loose glass. broken motor mounts. (stand on the brake, put it in drive, and give it a little gas, see if the engine moves up a little, while your buddy watches it)
check the play in the turbo/impeller strikes. melted rubber all over the rear rockers (if he says he babied the car, this is one of the areas id check) also, check the chip too. he may not know whats in it, and could have ran it hard, with a crappy chip. HUGE no no. Its a little more common that I though too.