Swap Blackberry Bold 9780+cash for iPhone 4/3GS ?

I am looking to swap my Blackberry Bold 9780(unlocked to any network and comes with charger)+100 for an iPhone 4 or the same swap but 40 instead for an iPhone 3GS. If you or anyone you know is interested in this swap then please get in touch :) Thanks, Andrew. call,text or email :)