A Martha’s Vineyard estate once favored by the Obamas as a summer retreat has quietly changed hands for $37 million — $2 million below its May asking price. The buyer is a trust tied to billionaire retail magnate Les Wexner, the longtime head of L Brands and founder of Victoria’s Secret, according to the Real Deal. Known as Blue Heron Farm, the 28.5-acre Chilmark property had been off the market for more than a decade, following an extensive transformation under its previous owners, British architect Norman Foster and his wife, Elena Ochoa Foster.