• Billy Joel is looking for a buyer in Sagaponack. Now that he and wife Katie Lee Joel are splitting up, the singer is planning to sell the two oceanfront properties he bought for her in 2007. The four-bedroom mansion (No. 1) and smaller beach bungalow (No. 2) will be listed with Corcoran's Biana Stepanian for a combined $35 million. [NYP]
• Richard Bressler, the former CFO of Viacom and now a managing director at the private equity firm Thomas H. Lee Partners, went into contract to sell his duplex at 850 Park last month. Now he's picked up a new place. Bressler paid $7.15 million for a four-bedroom condo at 170 East End Avenue. [Cityfile]
• Mariann Florio, the widow of former Condé Nast CEO Steve Florio, has paid $1.65 million for a three-bedroom apartment at 235 East 73rd Street owned by former Bear Stearns exec Leo Tilman. She's still trying to sell her vacation home in Key Largo, Florida, which has been on the market for $8.9 million since last October. [Cityfile]

• Marquis Jets co-founder Jesse Itzler and his wife, Spanx CEO Sara Blakely, have closed on the sale of their 14th-floor pad at 15 Central Park West for $8.7 million. That's a million less than their asking price, but $200,000 more than what they paid for it last March. [Cityfile]
• Leo Tilman, who was Bear Stearns' chief institutional strategist before starting up his own advisory firm, has paid $3.5 million for a condo at Tribeca's 101 Warren Street. [Cityfile]
• Sameer Nath, who heads up M&A for Citigroup in India, paid $4.4 million for a penthouse apartment at 1 River Terrace in Battery Park City. [Cityfile]