The home at 15 Dune Road in Bridgehampton was built by the late Ara Arslanian, a Belgian-American diamond dealer who bought the property in the early 1980s and died in November.

Dune Cottage in East Hampton closed on March 6, according to records, and the unnamed buyer scored quite the deal.

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The sprawling Hamptons estate owned by Alec Baldwin is back on the market for a noticeable price increase. The Emmy Award winner has relisted his Amagansett mansion for $21 million, about $2 million ...