How about a prius? gas mileage is waay better than anything that old, cheap to insure, doesn't ever need brakes if you can drive somewhat responsibly, very safe, clean, and even a new battery can be had for a reasonable price, if/when it comes to that. I'd say it's much better than trying to find replacement parts for a 30+ year old car.
Reminds me of a discussion of what's the best year of corolla ever built? 1986? 1978, 1992? Somebody responded with 2017, by far the best, and it's new and reliable. Sure it's more expensive, but you asked about best, not cheapest...