1 Week old Iphone 4s swap for Blackberry 9900 +

Hi there, I have a 1 week old (replaced by apple last monday) iphone 4s, mint and unlocked to all networks. Its the 16gb black model, and Im looking to swap for a blackberry 9900 Your blackberry must work on vodafone or be unlocked, and be in good condition with no scratches on screen etc. Im looking for 90 on top of your blackberry for my iphone, just as the iphone is a more expensive phone. Please no offers to swap for anything else, i want a 9900, no other phones.