I have a 1972 Plymouth Scamp that's been sitting for 25+ years, how much is it worth?

facts that hold true: if it runs, the price goes up. way up. the more complete the easier the sale. the cleaner the better. in certain locations current tags and title matter a lot.

pull it out, piece it together, clean it up, make it run. post up TONS of pics and a reasonable price. run the comps and see what other cars are selling for and frame your asking price based off that.