wanting to swap my galaxy s2 for another top phone *

As title says... Fancy a change so i am wanting to swap my galaxy s2 for another top phone. S2 is black 16gb boxed with charger,headphones and manuel. It is also updated with the lastest ice cream sandwhich (android 4.0) I have been using it on 3 but pretty sure its open to any network If not can easily be opened. Your phone must be on 3 or unlocked. Good condition, screen protector on since day 1also has rubber case but you may want to get a new 1 as mine has slight signs of everyday use. Great little phone. No silly offers, no time wasters and NO CONTRACT PHONES!!! Text if interested. Thanks.