Trade in your old iPhone now

The trade-in value of an old iPhone declines sharply before the launch of each new one, and Apple (AAPL, Tech30) is expected to unveil the iPhone 6 in just a couple of weeks — on Sept. 9.

In the past, prices for old iPhones have dropped 20% a month before and after the company’s announcement, according to Gazelle, a company that will buy your old iPhone from you.?

Read More At CNN.