It is going to be auctioned in about an hour, and it's online for everyone to see, plus videos of his curator, who worked with Bowie on acquiring and buying some of them. His art exposes David's life and personality in how he related to it. It is quite interesting. It's unusual to learn about one kind of artist's thought about art he enjoys by other artists. Sotheby's is an auction house. There are many branches of it throughout the world. I think there is one here in Houston.
Anyway, Bowie was quite a collector and his collection is worth seeing.