This parlor floor co-op at 496 3rd Street in Park Slope just hit the market with an asking price of $899,000. Located right off 7th Avenue, the apartment has two bedrooms (one decent sized and the other on the skinny side) as well as an open kitchen and exposed brick walls. There’s also a common roof deck with great views. And the kicker: It’s zoned for P.S. 321. Maintenance is a modest $750 a month. What do you make of it?