“Everyone knew that David Rockefeller’s Rothko would fetch a very high price. Sotheby’s, our eBay for billionaires, had guaranteed a figure of $46 million to keep the painting away from its archrival auction house, Christie’s. … The gaudy winning bid of $72.8 million, the highest ever paid for a work of contemporary art at auction, confirmed Sotheby’s confidence that a Rockefeller Rothko is now the ultimate luxury object.”