Metro

Half-off sale of Astor’s ‘$46M’ home on Park

A mystery buyer has agreed in writing to obtain the late Brooke Astor’s Park Avenue home — but for way less than half of the original $46 million asking price.

The Upper East Side building’s co-op board has yet to accept the bid, which a source described as “in the high teens.”

In the meantime, the sprawling duplex on the 15th and 16th floors of the classic 1931 Rosario Candela building has been shown to other interested parties — in an attempt to raise the bid past $20 million, said sources who have toured the unit.

As one broker put it, Astor’s estate is “simply dying to get another bid.”

That the low offer was accepted at all suggests Astor’s son, Anthony Marshall, and his wife, Charlene, “are desperate for money,” the broker said.

The Post reported last year that Marshall, 86, owed $7 million in legal fees. And those bills continue to mount since he’s appealing his conviction on charges of trying to swindle his mom out of $60 million — and is enmeshed in an epic legal battle over how much he’s entitled to from the estate.

The broker said the apartment — n the market for 2½ years — “needs a lot of work.” Still, it does offer 5 bedrooms, 4½ baths, 6 terraces, 5 fireplaces (with antique mantels), and views of both Park Avenue and Central Park.

jkeil@nypost.com