Biden owns the other du Pont residence in Delaware.
Foxconn.
Identities of buyers not known in 3 or more of these locations.
https://www.wsj.com/articles/biggest-real-estate-deals-2020-11609182297
https://nypost.com/2020/12/08/david-geffen-hits-pay-dirt-with-34m-empty-lot-in-beverly-hills/