There's a thriving market for used discounted iPhones in emerging markets even in places where Apple (NASDAQ:AAPL) isn't available according to a story from Business Insider. This may seem unfortunate for Apple -- it's missing out on possible sales -- but it actually appears to be a plus for the firm and the brand. Today's story on the used Apple market focuses on a company called Gazelle founded in Boston in 2006 which buys used smartphones online a lot of them Apple iPhones and then sells the devices to secondary markets. Some 75% of Gazelle's products go to wholesalers ...