Vanity Fair got real-estate expert Barbara Corcoran — co-founder of the Corcoran Group, and the woman Jessica used to call "The Corcodevil" — to weigh in on the most pressing question that confronts any viewer of a New York-set sitcom: how the fuck do those people live there? Unlike on Friends (which is unfortunately… » 4/19/12 5:20pm 4/19/12 5:20pm