Ambre Dahan, the French-born, L.A.-based design director of Joe's Jeans (and wife of Joe's Jeans founder Joe Dahan), knows that the online resale space is competitive. And crowded. After all, 2012 was filled with launch-after-launch: The Real Real, Vaunte, Shop Hers, and Material Wrld, to name a few. But Dahan believes that her self-funded site, Walk In My Closet, which launches today, is unique enough to make a real impression on the market. And she may be right.