Blackberry 9900 White SWAP for Iphone 4 White ?

Willing to swap my blackberry 9900 in white for an iphone 4 in white. Will also consider reasonable offers. My blackberry is unlocked to all networks. Only 2 months old in excellent condition. Fully boxed with all accessories and white leather case. SWAP for iphone 4 16gb in white OR CASH 250 o.v.n.o