Got it for $800. Not sure where to start. I don't have any tools yet but I do have the space and time.
Body is perfect. It needs a buff and polish though. There are like two small places that could use a paint touch-up.
The interior is in B+ shape. There is a seat cover that I haven't taken off yet to see what is underneath. The AC vent plastic is broken and needs to be replaced. The turn signal lever is loose and the whole thing probably needs to be replaced. No horn. The dash has been covered in some sort of padded vinyl. I'd like to get that back to stock. The Instrument panel has a few cracks and I would like that replaced. Windshield has a crack. Tailgate is frozen shut. Has a nice bed liner, not sure what is underneath.
I took it to a shop before buying it. Front brakes are real bad. Thermostat housing has a leak. Radiator has a small leak. Intake manifold gasket has a slight leak. Hoses, belts, and air filter need replacing. Battery is for a sedan and the contacts are loose. Alternator is in unknown condition.
That being said I drove it 40 miles home and it ran like a champ.
Here are pictures... 1981 GMC Sierra 2500 - Imgur