• Tom Flexner, a former vice chairman of Bear Stearns who joined Citigroup in April of 2008 to oversee its global real estate investment banking business, has closed on the sale of his four-story townhouse at 136 East 80th Street. The three-bedroom home, which Flexner first listed for $12 million last July with broker Kirk Henckels, and which went into contract to sell in May, sold to one Regan Fitzpatrick for $8.3 million. [Cityfile]
• Real estate investor Michael Hirtenstein has paid $16.8 million for five units on three floors of the Enrique Norten-designed One York, which he's planning to combine and use as a place to host "philanthropic events." [NYP]