Depends on who buys it...
If you sell it to an Olds nut then you'll get a few hundred more than you would on ebay... on ebay a few hundred more than local paper.
You can make the choice to try and buff out the paint and clean up the worn parts, but keep in mind doing that will turn off those wishing to make a "clean it up turn it over" deal.
I'd say that if it runs poorly and is mechanically worn out you could get 2,000 for it. If it polishes up, runs nice... doesnt blow smoke and feels tight in the 3,500 to 4,000 range if you find the right buyer. Much more than that and people start demanding it be more than "clean" but original with nice paint and other "nice" stuff that doesnt add anything to the mechanics of the car.
If you can, try to track down the build sheet (dash board... under the back seat... track down some olds nuts to tell you where you might get lucky.) Knowing some history behind it adds to the value, same as knowing about the different options.
Its up to you... but in some cases getting the paint redone helps the price. But the number of hours of prep work to get even a macco job look nice may not be worth it.
Watch Ebay and the olds/buick nuts for pricing and classifieds ads!
