EBay is offering iPhone sellers a $100 coupon if...

EBay is offering iPhone sellers a $100 coupon if their phones don’t sell on its site Sept. 1 to Oct. 24, eBay said Tuesday. In advance of the expected iPhone 6 launch in the next few weeks, eBay released an infographic presenting historical data to predict the impact the new iPhone will have on existing iPhones and the electronics re-sell market. According to eBay, with each new iPhone model, the selling price of the iPhone models 4, 4s and 5, after the 5c and 5s launched, “averaged at around $280.” Prices have reached up to $420 on eBay for a used iPhone, it said. Four previously owned iPhones were sold every minute after the 5s/5c announcement, eBay said, and 16,700 iPhones were sold on eBay the weekend following availability of the 5s/5c last year. Some 400,000 iPhones were sold during the release cycles of iPhone 4s and later, eBay said.