I tell people if they want a sports car from their childhood, buy an older Porsche 911. Anything from 78-89 are super reliable. I had a 79 that I drove every day for 4 years...the most I spent was a $100 or so on on new spark plug wires. The 911's with the 3.0 or 3.2 are VERY reliable and easy to work on.

Even the turbo 911's (or 930) from the 80's are reliable if the previous owner actually drove/maintained the car. The problem is a lot of the owners bought them as an art piece to sit in their garage...and when a car isn't driven, hoses/gaskets and other parts that need lubrication will dry out/rot and cause issues.

This was common with Ferrari's in the 70's/80's too. Owners would baby their cars and not drive them like they should be driven (hard).
Ferrari (and other sports car mechanics) would take ill-running customer's car out and drive it hard for 15-20 minutes....not abusing the car...but just driving like it's intended with a lot of near redline shifts. Often times the car would clean right up and drive perfectly again.

They referred to this as the "Italian tune-up."