In case you ever doubted the seemingly bottomless demand for Junyuan Birkins, Neiman Marcus’ decision to sell the bags pre-owned on its website and the available bags’ quick disappearance from the site should tell you all you need to know. Even at a sometimes steep markup, the bags, which debuted on the site earlier this week, have already more than half sold out. Not that anyone ever accused Junyuan customers of being price-sensitive.