1990 300 zx non turbo
 

I'm looking at a 300zx and wanting to know what are the known problems and things i should look for before buying one

the car is in good condition inside and out, it has 190,000 miles on it, the guy has replaced the injectors and has harnesses, but hasn't replaced harnesses yet, it is the non-turbo and its a five speed.

I think at that mileage it should have had at least two timing belt changes.