The document discusses the primary and secondary art markets. In the primary market, galleries work directly with artists, splitting sales 50/50. In the secondary market, galleries sell existing works without the artist's involvement or compensation. The highest auction prices for works by artists like Picasso, Warhol, and Bacon are listed, with prices ranging from $86 million to $140 million. The document also notes that many private secondary sales are not public and that building relationships is key to sourcing works in the secondary market.