I think AliveBoy has covered most of what springs to my mind.
If I was thinking of buying it I would also factor in the price for; gearbox oil change, diff oil change, oil & filter change, power steering fluid change, coolant fluid change, brake fluid change and clutch fluid change. Not going to be cheap to do all of that but imo it needs doing.
Some of the fluids should be changed regardless of the miles covered every 2-3 years ~ take a look at the 350Z service schedule here; http://www.350z-uk.com/topic/31110-service-schedule-for-a-350z/