• The Greenwich Village townhouse that belonged to late party planner Robert Isabell is up for sale again. Four months after an unidentified buyer picked up the home for $2.1 million, the 2,813-square-foot building at 16 Minetta Lane is now back on the market with a $3.5 million price tag. Then again, not every townhouse in NYC has a "basement hand-chipped by Tibetan-born sherpas" or a "rainforest atrium." [Curbed, PDE, NYT]

• Morgan Stanley CEO John Mack and his wife Christy appear to be the mystery buyers behind last month's purchase of the limestone carriage house at 165 East 70th Street. The 107-year-old home, which was sold to Mack in "distressed condition" for $13.5 million—and which comes with a 12-car garage, believe it or not—was purchased from Bunny Mellon, the 99-year-old widow of philanthropist Paul Mellon. [NYO]
• Sandy Gallin, the Hollywood talent manager-turned-serial house flipper, is at it again. The onetime manager of stars like Michael Jackson and Barbra Streisand, Gallin has placed his 14-acre estate in Bridgehampton on the market for $32 million. [WSJ, Saunders]
• Steve Black, co-CEO of JP Morgan's investment banking division, has sold his estate in Greenwich for $18.9 million. The English-style mansion, which Black bought for $13.75 million in 2001, had been "quietly" on the market for $21 million. The buyer is believed to be to be investor Gerhard Andlinger. [WSJ]