Need help pricing a 70' 340 Dart

I have a 1970 Dart in pieces that I am unable to finish. I'd like to sell it but don't know what to ask for it the way it sits. It was purchased new for my mom in 1970, has 51000 miles, is a real 340 car, automatic, numbers matching, with original build sheet. It is all original with the exception of a paint job and sunroof that my dad added in the early 70's. It has surface rust and a few perforations. The rust perforations are the top of the fenders, behind the rear wheels on the quarters and a small hole in the trunk where the trunk lid leaked. The floors are good with the exception of surface rust on the bottom. All in all it is a pretty solid car.

The car also comes with a 1971 donor car that is in amazing condition. It is a southern, two door car. Has one rust spot behind the right rear wheel in the quarter. Any honest pricing help would truly be appreciated. Thanks.