Steven A. Cohen, Founder and CEO of SAC Capital.

The opening of Art Basel Miami Beach, under way here this week, looked like the start of the most glamorous doorbuster sale in history, with hundreds of V.I.P.'s streaming into the convention center wearing high-end resort casual, ready to rummage through more than 200 of the world's most prestigious galleries.

Among the shoppers were prominent collectors like Peter Brant, the newsprint executive, who strolled with the actor Owen Wilson. At the Gagosian Gallery booth, P. Diddy gave a hug to the casino mogul Steve Wynn beside a $2 million sculpture by Roy Lichtenstein.