Beau Sancy Beau Sancy The Beau Sancy is a modified "pear double rose cut" diamond found in India that has been owned by a number of European royal houses. In May 2012, it was sold at Sotheby's auction in Geneva for $9.57 million. The original estimated price of $2 million was lifted five times during the eight-minute battle between five buyers, before the diamond was sold to one of them who remained anonymous. The Beau Sancy diamond takes its name from Nicolas de Harlay, Lord of Sancy, who brought the diamond to France from India where he had been the French ambassador.
Sequential auction a better strategy: she can let Bob win the first item (e.g. by bidding 0). Then, Bob will not participate in the second auction at all, so Alice will win the second item and pay 0, and her net utility will be 5 − 0 = 5. A similar outcome happens in a SAFP. If each item is sold in isolation, there is a Nash equilibrium in which Alice bids slightly above 4 and wins, and her net utility is slightly below 2. But, if Alice knows Bob's valuations, she can deviate to a strategy that lets Bob win in