Need vs. WantReally, really Want. I love the draping in the back, and — depending on how you rock it — this dress could go uptown, downtown, or cross town. Mercifully (for my pocketbook) it was immediately snapped up at the sale price by someone else.Stella McCartney belted one-shoulder jersey dress, $422.50 (originally $845) at theoutnet.com. More good pieces from the same sale here.