If you get a good one, some of those older cars will just keep running forever.
My parents got a 1980 Ford Fairmont wagon in a year that was later determined to be a banner year for lemon law enforcement, and their car model was usually considered a complete piece of crap. Strangely enough though, they managed to get the exact right combination of options and avoided almost all of the problems. They had the 3-speed auto which never gave them real problems except for simply wearing out after 120k miles of hauling trailers up mountains, etc., the 255 V8 which was waaaay overbuilt and only died because my Dad didn't change the oil often enough and it chucked a rod at 105k miles, and the rest of the car was pretty much stripped of options except they got the "squire" model which had crappy fake wood paneling and a nice bonus, a thick and very effective underbody coating from the factory.
Due to the coating, the car went 20 years in southern california and colorado without rusting. They coated almost the entire underbody and bottom 12 inches of the doors, unlike most cars today which only get underbody coatings in specific "problem areas". It survived almost 200k miles (on it's second engine and second transmission) and several coast to coast road trips, when my sister in law wrecked it.
It needed some interior work due to the fabrics and vinyl falling apart, but there was pretty much nothing mechanically wrong with the car after all that time. If it hadn't been crashed, it would probably still be running. Yea, I had to swap out the occasional part, but never anything that I couldn't do in a parking lot with the toolkit I kept in the car.