swap blackberry bold 9900 for iphone 4 or 4s !

here for swap is my very rare blackberry bold 9900 it has a custom made housing so only one on planet no marks at all works perfect on 02 network but can be unlocked for 5 pound i would like to swap for iphone 4 or 4s on o2 network or unlocked must be in good condition dosnt matter about colour or box aslong as it isnt blocked and is working perfectly.