At the northern tip of Manhattan -- where the Hudson and Harlem Rivers join , the cliffs of New Jersey 's Palisades glisten at sunrise and the woods of Inwood Hill Park are a short walk away -- three one-bedrooms in a single co-op complex have sold for less than $ 250,000 this year , said Ms. Suggs , the owner of Willie Kathryn Suggs Licensed Real Estate Brokers .