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• NBC chief Jeff Zucker's former duplex at 239 Central Park West (left), which he sold to Marti Meyerson and her husband Jamie Hooper in 2006 for $15.7 million, is back on the market. The 11th and 12th floor apartment is now listed for $17.5 million. Meyerson is the daughter of Morton Meyerson, Ross Perot's onetime business partner and the former chairman and CEO of Perot Systems. [Cityfile, Corcoran]
Bob Weinstein and his wife Annie Clayton have paid $15 million for a four-story, 6,580-square-foot townhouse at 39 West 70th Street. [Real Deal]
• Big time art collectors Donald and Shelley Rubin, who made fortune with the MultiPlan health care network, have put their townhouse at 122 East 70th Street on the market with Kathy Sloane for $20.2 million. [NYO, BHS]

• Architect Diane Procter has lowered the price of her 5,780-square-foot townhouse at 112 East 73rd Street, which she bought with her husband Stephen Wang in 1994 for $750,000. The six-bedroom manse, which was transferred to Procter's name in 2006, was listed for $16 million last October, but is now priced at $12.65 million. [Cityfile, Sotheby's]
• Dick Cavett paid $4.2 million for a seven-room apartment at the Kenilworth at 151 Central Park West. [NYO]
• Is Christopher Buckley still trying to sell the duplex at 778 Park that was once home to his parents, the late Pat and William F. Buckley? The apartment was listed for $24.5 million last year, but Buckley took it off the market in March. An offer of $18 million should be enough to convince him otherwise, however. [NYO]