Hotshot Douglas Elliman agents Tom Postilio and Mickey Conlon, stars of HGTV’s “Selling New York,” have closed their first Hamptons listing since joining the firm – a shingle-style, four bedroom Amagansett house for $2.75 million. That’s $55,000 more than the $2.695 million asking price. It probably doesn’t hurt that the duo (Postilio is a former professional singer and Conlon a Broadway producer), boast a bevy of celebrity clients including Liza Minelli and Barry Manilow.