Value of car purchase? Please, it's complicated!

Thanks for all the input!
The interior was immaculate off the show room when we bought it. The rear seat belts were still in plastic and rotted rubberbands from factory. It had been in storage for over 25 years. Only the drivers seat had ever been sat in.

The only thing was wrong with it was the mature lady who owned it keept scraping the pass side on garage opening and had gotten the drivers side a few times too befor the family took the keys away!

The guy I bought it off of was selling from estate.

When you get in and sit in this car it whirls you straight back to 1969!!
I hope we can work something out because ABodyBetty and myself have always liked this car. It has went down hill a bit over the past 2 years, driven daily and kept outside and he hardly ever washes it in the winter. The bumpers are starting to rust from salt.
We hope to give this car it's loving home it once had here with us!8)