Could it be the halo effect of Sandy and Joan Weill‘s unloading their 15 Central Park West penthouse for $88 million? The proverbial little bird chirps that Courtney Sale Ross has finally found a buyer for her double duplex apartment at 740 Park–and got her asking price of $60 million via Kathy Sloane at Brown Harris Stevens, whose listing for it is here. Officially listed last November, though it was available as a semi-secret pocket listing long before that, the apartment is on the 12th and 13th floors of the fabled co-op. Ross and her late husband, Warner Communications mogul Steve Ross combined units in the C and D lines running the length of 71st Street that both use the building’s low-key chic 71 East 71st Street entrance. Sloane could not be reached for confirmation and the buyer is as yet unknown, but if it’s true UPDATE: a second source confirms a deal has been struck so, congratulations are due all around. And then, there’s what this says about Manhattan real estate. “The high end of the market is out of control,” raves a well-connected broker.