This house by designed by Richard Neutra is currently being auctioned and expects to go for between 15 - 33 million. It's being marketed as a work of art and hope is an art gallery will buy it. It's property is amazingly large with tennis courts, pools, etc all behind a huge hedge.''
Kaufmann Desert House - Richard Neutra - Great Buildings Online
I was interested to learn that the seemingly "top story" is a "gloriette"...a ruse to make a second level since these were against the building laws. They got away with it by making it open on all sides I believe.