A Sale at 15 CPW; Bobby Flay's Hamptons Buy

• One month after he unloaded his Greenwich mansion for $18.7 million, former Goldman Sachs partner Donald Opatrny has shed himself of his apartment at 15 Central Park West, too. The 35th floor, three-bedroom condo, which Opatrny purchased for $11.6 million in January 2008 and listed for $26 million in June 2009,…