Buying sprint from radio shack?!!? PLZ ANSWER ASAP?

hey guys im looking to purchase today so PLEASE answer ASAP ok on the sprint website they have the blackberry curve 8530 for 50 dollars but on radio shack this weekend its free... is there a catch or something? because im wondering if i should get the phone from radio shack or the sprint website... also i am not... show more hey guys im looking to purchase today so PLEASE answer ASAP ok on the sprint website they have the blackberry curve 8530 for 50 dollars but on radio shack this weekend its free... is there a catch or something? because im wondering if i should get the phone from radio shack or the sprint website... also i am not currently a sprint customer but im switching to it... thanks
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