Is now the time to sell your old iPhone?

Matt Grayson/PA Wire/Press Association Images

The world is waiting for the iPhone 5, which will hit the stores on 21 September and start flying off the shelves shortly afterwards. For the majority of buyers, this will constitute an upgrade of an existing phone. So it begs the question of what you should do with your old one.

If you're happy to part with it, you could make more than you think, but you'll have to act fast.

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