The iPhone 6s is still a couple of months away from going on sale, but if you’re hoping to offset the cost of buying a new iPhone by selling your old handset, now’s the time to do it.
That’s because resale values drop by around 10 percent in September and October, according to gadget trade-in site NextWorth, which analyzed thousands of eBay sales. If you wait until November or December, meanwhile, be prepared to lose around 30 percent of current resale value.
