What could be better than a sprawling home in one of the Hamptons’ most exclusive enclaves on the banks of the tranquil Sagg Pond, with sweeping views of the ocean? What if that home sat on one of the largest parcels of privately owned land in the area — 33 acres to be exact — and was bordered by dozens of acres of protected land, ensuring privacy and pristine conditions in perpetuity?

The seclusion may be the biggest selling point of the estate belonging to Robert Hurst, a former executive at Goldman Sachs, which was just listed by Debbie Loeffler of the Corcoran Group for $65 million.

The price doesn’t quite compare to the $103 million that the investment banker Ron Baron paid for 40 acres of undeveloped waterfront property in East Hampton in 2007, but it would set a record for a home sale.

That record was set in 2008, with the purchase of an eight-acre estate on the ocean in Southampton for $60 million, said Jonathan J. Miller of the appraisal firm Miller Samuel.

Mr. Hurst’s home is in Sagaponack, between Bridgehampton and East Hampton, a once-sleepy hamlet first dominated by family farms, then colonized by artists.

The bankers soon followed. Mr. Hurst, who also served as the president of the Whitney Museum, was among the first Wall Street tycoons to settle in the area. “He planted the flag,” said Ms. Loeffler, a resident of Sagaponack herself.

But Mr. Hurst’s home, which has nearly 1,500 feet fronting the pond, remains among the more unusual properties on the South Fork.

The house itself, designed by Francis Fleetwood, has eight bedrooms and eight and a half bathrooms spread over 11,000 square feet. The property has a tennis court and a pool. But what sets the place apart is the amount of land that comes with it and the protected land that borders it. The 19 acres to the left of the driveway are preserves. Much of the nearby beach is also protected.

“It is really one of the few pieces on the market at all with this kind of privacy,” Ms. Loeffler said. “There is really nothing like it.”

Ms. Loeffler said Mr. Hurst had decided to sell because he was now spending most of his time in Aspen, where he is on the board of directors of the Aspen Institute, and in Paris. Several years ago, he sold another of his New York trophy properties, a duplex at 950 Fifth Avenue, for $25 million.

This home, Ms. Loeffler said, is close to his heart.

“He loves it so much,” she said. “He would love to see it go to someone who loves it as much.”