As a German I wonder why was this treasure given away to a US museum? Also what is the legal status of ownership of all this? Would have been interesting to read more about this.
https://www.pressebox.de/pressemitteilung/sap-ag-walldorf/co...
[1] https://www.geekwire.com/2024/seattles-living-computers-muse...
But in this case the answer seems simply, in germany the stuff was rotten and nobody took proper care of it anymore, so I guess it was simply sold? The article is not clear about it, but it lead with "abandoned in a warehouse".