Among the most expensive white-elephant properties languishing on the market in the New York City area are a 25-room mansion on 60 acres in Bridgehampton, which has been listed for a record $75 million since 2003, a 16-room triplex at the top of the Pierre Hotel, which Wall Street-guru owner Martin Zweig has wanted $70 million for it since first listing it in 2004, and Penthouse magazine founder Bob Guccione’s six-story mansion in Manhattan, which has been available since 2002 and currently is listed for $59 million.

The New York Post’s Braden Keil reports on these and other long-listed properties (link: NY Post) and also has a slide show of several of them. Other languishing properties include the five-bedroom Sky Studios party space on Broadway that was the site of a well-known pool scene in an episode of “Sex and the City,” which originally was listed in 2002 for $27.5 million and now is available for $22.5 million; comedian Eddie Murphy’s 32-room, 25,000-square-foot Bubble Hill mansion and 5-acre estate in Englewood Cliffs, N.J., which first was listed in ’04 for $30 million and now is available for $22 million; socialite Anne Slater’s $17.7 million co-op unit on Fifth Avenue; and two townhouses on the Upper East Side that have been combined into a nine-level, 20,000-square-foot mansion with two elevators and 16 fireplaces. That megahome has been available sine 2001 and currently is on the market for $37.5 million.