That annual Apple rite is almost upon us: The introduction of the next generation of iPhone. This year rumors have it we’ll see not one but two new iPhones introduced Sept. 10, but that’s probably got a lot of you wondering how you can cash in your current Apple smartphone or any older models you might have lying around. Well, there is some art to timing the sale of an iPhone, and unfortunately, the ideal time to cash in was last month, according to NextWorth, a company that will buy used iPhones based on its current market value. And with the clock ticking on the next generation iPhone’s official release, that price is rapidly dropping. All phones generally lose more resale value the longer you are from their release dates, but the iPhone manages to retain its high price tag far longer.
