At this point, everyone knows that Apple’s going to unveil the new iPhone next week, which means that your window of opportunity to sell your old iPhone 4 to some sucker has pretty much closed. Don’t fret, though. We know someone will buy your used iPhone 4 from you for a good price. If you’ve got an iPhone 4 in decent nick, is promising to give you $ 250 for it… a $ 50 premium over their usual trade-in price, no questions asked. That’s crazy. Crazy… like a fox!   To qualify, you must have a 16GB or 32GB AT&T iPhone 4 in good working condition with no heavy scratches or cracks. Says Jeff Trachsel, CMO of NextWorth, “With so much uncertainty surrounding the launch of the iPhone 5, we wanted to take the guesswork out of wondering when to upgrade/sell your old phone. Combined with the 21-day price lock, the extra $ 50 for trading up to the new iPhone through NextWorth is a no-brainer.” If you’re interested, you can check out the details of the trade-in offer here.

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