I had a '78 GMC pickup until about six months ago. My brother in law bought it new in '78, and it had been in the family ever since. Can't tell you how much it sucked to sell her.
i had a 79 leSabre. $950 for it in 1995 if im not mistaken. Ran 'ok', but got about 7 mpg.
my dad had a 71 chevy truck. he sold it when i was helping my brother move and tried to stop for a red light at an intersection and had the brakes go out.