Being broke has an upside: You generally pay less taxes, know about the coolest free stuff in the city, and have an excuse to drink Pabst Blue Ribbon. Then there's the downside. Like, say, when you spot a gorgeous green jacket in the window of Marni, peek at the price, and realize it's worth more than your car. Still, fashionistas with disposable income will fall in love with this low-key, high-priced boutique on the corner of NE Second Avenue and 39th Street in the Design District. Among the collection: quirky old lady-print tanks, knee-length dresses in Jackie Onassis cuts, and hand-sewn designer bohemian accessories. Think Anthropologie's classy (possibly Italian) older sister. Most garments look as if they've been yanked from the runway — only you don't have to be a twig to find something that fits: knee-length layered skirts ($885), chunky wood-beaded necklaces ($990), and simple, sophisticated slacks ($750). Just be careful about developing a Marni obsession; you might have to take out a second mortgage.