The limestone residence at 165 E. 64th St., between Lexington and Third avenues, was asking $18.5 million. A rare gut-renovated turn-of-the-century townhouse on tony East 64th Street has found a buyer within three weeks — and it’s an all-cash deal, Gimme Shelter has learned. The limestone residence at 165 E. 64th St., between Lexington and Third avenues, ... [3181 chars]