I am looking at buying an 85 300ZX non turbo with the 5 speed 2 seater and T-Tops. I am a first time Z buyer and want to get one with little or no problems. What are some common problems and what should I look at when checking out the engine and body. The one I am looking at is $2,500 and the current owner says it has 70,000 miles but I'm not sure if that is 170,000 because I haven't seen the car yet. Just basically looking to see what problems I should be looking for and asking the current seller about. Thanks to anyone with help!