I have bought probably six or eight "estates" over the years where they are willing to show up for the "make me an offer...PLEASE", some actually drove a long distance for one lump sum so they don't have to deal with onesy twoesy sales.
I had one guy back in the prime days of musclecars drive a state away and sold his Dads lifetime collection, a stash on a trailer and in bed of a truck for $1500...six rears out of GTOs, trim,, tachs, grills...bunch of stuff.
He was ready to go to the dump but couldn't bring himself to do it in his Fathers memory.
There was a car for sale on here some years back by friend of the family (PY member) and blah blah blah..wanted to sold to Pontiac person who would do this and that.....she gets new boyfriend and it got pushed outside and his stuff in the shop....fire sale.
You cant bank on "instructions" being carried out when you are gone....esp if new boyfriend isn't into Pontiacs....
Personally, I wouldn't dump this big a burden on any family member, or friend, not for the prices used parts are fetching now and where it may be going.
Now, cars are much easier if done and they run.