This week's top stories: On the Market: Hansel and Gretel's Bay Ridge Hidey Hole, BLOCKBUSTER: Nolita's 11 Spring Street Has a Buyer!, New Cooper Union Building's Secrets Revealed!, Closings Begin at Nouvel's West Chelsea Vision Machine, Curbed Inside: Harlem's PS90 Gets Un-Schooled, Frank Gehry's WTC Performing Arts Center: Worth Saving?, City Sticking New Sister Buildings on Empty Harlem Lot, Introducing the Latest Crazy Greenpoint Waterfront Plan!, Jane Hotel Stay Interrupted By Death Down the Hall, Tipping Point: Co-op Bans Holiday Handouts to Building Staff