Spare parts for the Apollo Lunar Module get auctioned too. NASA apparently just sold the lot when they shut down the Apollo program. Put it in a museum? Nah, we can totally get a fiver for this thing.
https://www.yorkpress.co.uk/news/9664538.the-falklands-raid-...
There may or may not be six pelican cases full of junk, I mean totally useful equipment, next to me in my office right now.
If they turn out to be valuable our grandkids can read about how someone donated them from their private collection.
(I don't mean it in a demeaning way. It is just an observation and I think it has some advantages, too, if you do not preserve every building there is for example.)
Cars seem like they'd be similar but I don't know any car collectors. I've also heard of antique furniture auctions, very curious what those collectors are like.