Iphone 4 16gb white swap for other phone !

i have a iphone 4 16gb in white i have the box etc and a few cases and screen protectors. i am looking to swap for another phone. please email or text if interested. i am currently on Vodafone and ideally would like another phone on the same network or unlocked please. I have posted this ad before and i had a lot of response however my emails on my computer wiped out and i was unable to read and reply please contact me again many thanks