Hi Steve, sorry about what the family is going through...
My good friend also was trying to sell a car for his father in law...
I listed it here - and honestly, he struggled for over six years to sell it, off and on.
https://www.yenko.net/forum/showthread.php?t=154827
It is a documented 1970 W-31 that may or may not have had the original motor and he finally let it go recently for $32K CDN or $23,360.00 USD
I'd never seen the car in person, just throwing this out there too.
Good luck with everything,
Anthony