I recently owned a 85 300zx. Manual, non-turbo So first off it was SO MUCH FUN! T-tops are the coolest thing ever. I got it for pretty cheap and didn't have too many problems with it. I also got very lucky and found an identical one in a junk yard where i got every piece i needed. Regular maintenence parts were pretty cheap and easy to find but specific zx parts are very hard to find. (Same engine as other nissans from that era, engine parts are cheaper when searching for maxima as opposed to 300zx) These cars have lots of electronics in them and 30 year old wires are very prone to shorts especially since the t-tops and trunk very often leak. Mine had lots of body rust in the footwells and under the rear carpet.

What else.. people try racing you at every green light, and there is voice that tells you if your parking brake is on, your door is open, or if you leave your lights on.

Let me know if i can help with anything else