I have a friend with a 1980 SC, 450,000 miles and counting.
Had a full motor rebuild at 250,000 miles and a glass-out repaint around 350,000 miles.
Has no plans of ever selling, still takes multiple trips from NC to FL.
Goes through a lot of rear tires, LOL
Video of the repaint
https://youtu.be/GFzEcIDnj68