A penthouse unit at the Baccarat Hotel and Residences has found a buyer, following a price chop down to $54 million. Starwood Capital Group and Tribeca Associates, the developers of the 50-story tower on West 53rd Street, had recently reduced the price by $6 million, down from its $60 million asking price. The duplex penthouse, boasting 7,381 square feet, sold for an undisclosed amount, according to Crain’s.