Darto wrote:

Old cars.

Back in the 80's Bill Harrah (casinos Vegas, Reno) still had his old
car museum, close if not best in the world,
Didn't charge but peanuts to see it all.
Then he died and the kids, thankful for inheritance, announced ready
to sell.
I remember an expert stood up high platform with megaphone describing
anything about the cars when anyone asked.
Lo tech presentation.
Somehow a lot of it was saved and is still a decent exhibit.
Public now.

I was fortunate enough to be able to visit the museum in Reno in 1980.