• Financier J. Christopher Flowers is putting his Upper East Side townhouse—known as the Harkness Mansion—on the market. It's "quietly being offered" for $49.95 million, which is a few million bucks less than what Flowers paid for the 50-foot-wide townhouse when he bought it from Jacqui Safra and Jean Doumanian in 2006. [NYO]
• Former Revlon CEO Jack Stahl has paid $8 million for a 21st-floor apartment at 255 East 74th Street. [Cityfile]
• Equinox founder Danny Errico and his wife Vera have sold their six bedroom, oceanfront mansion at 71 Shipwreck Drive in Amagansett for $11.895 million. [NYP]
• Manchester United manager Sir Alex Ferguson may be trying to back out of a deal to buy a three-bedroom penthouse at 200 East 66th Street. [NYP]

• After almost a year on the market, Moby's penthouse apartment at 300 Central Park West has finally sold for $6.7 million. The buyer is listed on property records as T.M. Dempsey. [Cityfile]