From the last bread was a post about the rothys selling sell and how they must need money.
Many of those goodies have probably been passed down for generations and now, the younger generations don't want it won't use it and since it is expensive and the name alone will bring in money. They just don't donate it.
Ever had relatives die and you have all their junk to go through?
Ever go to estate sales and watch people pawing through all the items?
It's that sort of thing. Uber rich families get to do what we normies do as well.