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As the sharing economy expands, peer-to-peer exchange sites such as Refashioner have pushed the industry from power drills and waffle irons into communities trading in penthouses, Porsches, and Prada.

Next time you stand in front of your closet with no idea what to wear, remember there’s an army of wannabe Anna Wintours and Rachel Zoes on Polyvore.com, ready to crank out trendy head-to-toe looks by tapping a vast database of designer apparel and accessories. Next time you stand in front of your closet with no idea what to wear, remember there’s an army of wannabe Anna Wintours and Rachel Zoes on Polyvore.com ready to offer inspiration.