Those actions only help the SELLER establish value.
What if: there is no motor, no drive drain, the car is stripped of every valuable option if may have come with, and its so rusty, it may need to go to the frame during a proper resto. BUT... it still has the broadcast sheet, and shall have some decent value once restored.
In a full restoration to one of those show-quality or museum-quality cars, pretty much every part has to be inspected and replaced with a better specimen (when the one on hand is beyond restoration) anyway.
So then, ask yourself, what is the opportunity to rebuild a valuable car by finding and replacing most of the parts worth to you?
TBH, 30K is a decent price just for the shell, just for the chassis with build sheet. For this car? I would pay it. Maybe even 35k. Maybe even 40.
I'm confident there are buyers out there willing to pay 40K for the opportunity to restore something genuine, instead of those "tribute cars" or "clones" as others may choose when they have no other options.
You, John, have options. But they wont last for this car