Just have them come and pick it up. They will make a show car out of those parts.
http://www.foxnews.com/auto/2018/04/10/family-finds-mysterious-69-year-old-classic-car-buried-in-yard.html
Saw that. Pretty cool find but apparently it is worth absolutely nothing.
Believe me, they can fix it! LOL They can take a car that all that it there is a rusted out firewall, and make a show car out of it. No way I would buy it, but that't what they do.