• 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]

• Publishing heir Robert Ziff has dropped the price of his three-bedroom condo at the Trump International. The 41st-floor pad, which Ziff picked up for $5 million back in 2001 before moving to 720 Park a couple of years later, first went on the market for $13 million in July 2008. It's now listed for $11.5 million. [Cityfile, Sotheby's]
• Selling the triplex penthouse at 895 Park that once belonged to the late producer Charles Evans hasn't been easy. The co-op's board, led by real estate developer Dan Brodsky, has turned down an offer for the third time. Now that the unidentified financier's $14 million bid has been rejected, the apartment is now back on the market for $15.5 million. [NYO, Stribling, previously]
• KKR partner Alexander Navab has put his four-bedroom apartment at the River House on the market for $24.5 million. The 4,806-square-foot co-op comes with terrace, private elevator, and river views. [Real Deal, Sotheby's]
• Real estate developer Andrew Heiberger has sliced 12 percent off the asking price of his townhouse at 161 East 63rd Street, which he bought for $8.15 million in 2004 and put on the market for $16.85 million in February. The six-story mansion is now listed for $14.85 million. [Real Deal, Sotheby's]

Since it was built in 1931, River House, the swank and secluded Art Deco palace behind wrought-iron gates at the dead end of East 52nd Street, has topped the short list of exclusive (and very expensive) co-ops along the East River waterfront. Home to Henry Kissinger (and Pete Peterson until recently), the building boasts three 20 million+ listings at the moment, including a large tower duplex owned by real estate mogul Francesco Galesi, which was boldly listed for $50 million almost three years ago but has since come down to $35 million. (Other apartments for sale include Laura Pels' terraced third-floor unit for $29 million, and the opulent maisonette of Chicago producer Marty Richards.) Naturally, it's also home to a long list of heavy-hitting political donors. After the jump, a list of what some River House residents have done with their cash in this year's battle for the White House.