iPhone upgraders leave nearly $13.5B in old hardware to collect dust

According to research group OnePoll’s “Mobile Mountain Study,” conducted for resale website SellCell.com, iPhone owners are leaving a collective pile of unused legacy hardware on the table estimated to be worth $13.4 billion on the resale market, reports MarketWatch. That number has grown from the year-ago period, which saw about $9 billion worth of iPhones stashed away.