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• The buyer who plunked down $9.41 million on Bernie and Ruth Madoff's oceanfront home in Montauk home has been revealed: It's billionaire real estate mogul Steve Roth and his wife, Broadway producer Daryl Roth. [WSJ]
• Alexander Navab, a partner at KKR and co-head of the firm's private equity business in North America, has paid $4.9 million for a two-bedroom co-op at the River House on East 52nd Street. Meanwhile, his four-bedroom spread just a few floors up remains on the market for $24.5 million. [Cityfile]
• The Minetta Lane townhouse owned by late party planner Robert Isabell has been reduced in price since first going on the market for $3.95 million. The 2,813-square-foot building, which features a "basement hand-chipped by Tibetan-born sherpas from Brooklyn," is now $3.45 million. [Curbed, MK]

• Leonard Mandor, the CEO of Florida-based Milestone Properties, has picked up an apartment at the Harrison on West 76th Street. He paid $4.575 million for a three-bedroom penthouse. [Cityfile]
• Susan Dusenberry, the widow of advertising industry legend Phil Dusenberry, has put her North Haven estate on the market. The 6,800-square-foot, Peter Cook-designed manse is listed for $18 million. [Newsday, Corcoran]