A second D-line apartment at 15 Central Park West is available for resale within several weeks of the first one going on the market. The three-bedroom, 3,173-square-foot unit 35D is on the market for $26 million, according to Streeteasy.com. Donald Opartny, a partner at Goldman Sachs, purchased the unit in January 2008 for $11.6 million. Brown Harris Stevens’ John Burger, a senior vice president and managing director, and Richard Wallgren, a BHS vice president, have the listing. Burger declined to comment on the unit, saying he is under a confidentiality agreement for the listing. [more]