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  1.    #1  
    Buying an iPhone 4? Consider selling your old model

    Both NextWorth and Gazelle say they will offer up to about $100 for iPhone 3G models and $200 for iPhone 3GS, the most recent iPhone, in good condition.

    MORE INFORMATION ON:

    Buying an iPhone 4? Consider selling your old model - USATODAY.com
  2. #2  
    And slightly more money for higher GB IPhones too. IPhones come in 8Gb and 16GB models.

    The reason for such high resale value is that IPhones are in high demand in other areas of the world.
  3. #3  
    Also you can buy these as replacement iphones if your original one gets damaged or lost.
  4.    #4  
    someone have to unlocked them first to sell outside the US. The problem is that you can not update the ios It could lock it or not well functioning issues and cannot buy apps, unless these guys sell them with some apps included.

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