Steve Witkoff is fed up with high cost of development in New York City, but he can still make money in other ways — his firm the Witkoff Group just sold two of its four office condos at 420 Fifth Avenue for over $52 million. Ziff Brothers Investments picked up the fifth floor, which will be used for its new headquarters, for $27.3 million, according to Rudder Property Group, whose Michael Rudder and Mike Heller […]