Stephon Marbury copes with his floundering career in his own special way: "Stephon Marbury, the unwanted Knicks guard, is going ahead with buying a $40 million private jet, as Page Six first reported back in August. Although Marbury has yet to play this season, and the Knicks brass can't find any other team willing to take on his $21 million salary, the untradeable Coney Island native is awaiting delivery of the aircraft, according to the buzz at SoHo's Salt restaurant".[Page Six]