A group of investors, headed by Daily News owner Mortimer Zuckerman--who is the CEO of Boston Properties--have purchased the GM Building and three other Midtown buildings for $3.95 billion. The GM Building alone went for $2.9 billion, which is "the highest price ever paid for an American office tower," per the NY Times. The GM Building, located at the corner of 5th Avenue and 59th Street, has over 2 million square feet of office......