iPhone 3gs unlocked 16gb -

Hi i have a iPhone 3gs 16gb and factory unlocked to any network the phone has had a new back on it which is white but it has been used since then so some scuffs on the back of the phone it also has had a new white screen with a black home button. Like the back of the phone the screen will have some minor scratches on and there is some dust under the screen all comes with box and the 2 pin charger i will take 170 for the phone or i will swap the iPhone for a blackberry bold 9700 and 80. The blackberry has to be unlocked to any network call or text me on 07847548329