Heavy on fuel
Not really. Similar MPG to a 260Z. The turbo Z31 was getting 31mpg on the highway when new. 20mpg in the city.
expensive to repair
Not if you do the work yourself and buy the parts from the USA, or pick up a cheap parts car.
Eg: Nissan Australia quoted me $80ea for lifters some years ago. I bought them from the USA for $8 each.
There's a large enthusiast community in the US that can help you fix anything on these cars (z31.com/phpBB3/ and z31performance.com).
many would be tired now
Yeah there are alot of neglected Z31's around, but they can be had really cheap for parts.
As Lynton says, find a good one with a service record.
probably relatively expensive to insure.
My Z31 turbo is only around $300 a year for full comp. Though for someone younger, it will probably be more.
As a first car - in my opinion a terrible idea.
Yeah, I'd have to agree. Get something newer, more reliable as a first car.
Z31's dont really retain any value, and I don't see them becoming desirable or collectable in the near future. Of course there will be die hard Z31 fans that will disagree.
Common problems with the Z31:
Fuel gauge sender stops working.
Headlight switches stop working.
Injectors can leak (engine catches fire)
vacuum hoses perish and leak (and there's alot of them that control emissions stuff on the engine)
t tops can leak