♦ Brooke Astor's former estate in Westchester has finally hit the market: Holly Hill is now up for sale for $12.9 million. The 10,000-square-foot mansion includes 13 bedrooms, six marble fireplaces, indoor and outdoor pools, and views of the Hudson River. [NYO, Sotheby's]
♦ The Greenwich Village townhouse owned by the non-profit group Pen and Brush has gone on the market for $13.525 million. [NYT, PDE]
♦ Corcoran broker Leighton Candler, who currently has the listings for Brooke Astor's former co-op and Bill and Tina Flaherty's spread at 1040 Fifth Avenue, has placed another pricey property on the market: A full-floor apartment at the Ritz-Carlton on Central Park South can be yours for $35 million. [NYO, Corcoran]