I visited the museum on a slow day sometime in the mid 1980s, and Pat checked me out for the items I'd bought from the souvenir shop. I mentioned to her that a friend still owned a 100% complete Don Hardy funny car that had he had raced as Dickie Harrell. He and Harrell had been associated for a long time and these were the days where there were so many bookings available that a famous driver couldn't accept them all. So the Dickie Harrell some people saw race was actually my friend.
She sort of perked up her ears and took me back into the shop where Don was working. I explained what the car was (second Camaro Hardy ever built, raced with Chevy engine, paint by Oop) and its history. He asked a few questions and then said he'd love to have it for the museum and would accept its donation.
So just another data point. At least at that time, he didn't seem interested in paying even a small amount for historic cars. I'm not downgrading the man in any way and understand that back then he may not have had the funds to actually buy cars.