for sale or swap iphone 3gs in green ?

hi im wanting to sell or swap my iphone 3gs 16 gb in mint con my iphone is on o2 tesco its green as u can in picture im wanting to swap as im bored of this but will sell if good offer i dont no long have the box lost it when i moves please its not a pound its swap or good offer please dont ring i be at work or busy text or email me i get bk to u right away this phone cost alot of money to make it green thanks for readding my add if u need more info text email please thanks u x