used iPhone 3GS 16GB locked to O2 !

Hi, up for sale is my iPhone 3GS (White) 16GB. (phone only) I bought a new phone and now I don`t need this one any more. There are a few scratches on the screen and on the back from normal use. I´m not big fan of Apple any more so i bought a Samsung. I just read that it is possible to unlock it though the O2 website for 15pound if you like. )https://www.o2.co.uk/apps/help/help?qid=1&q1=2&route=unlocking&case=Handset%20Unlocking%20Form) Not for 0.01, please make your best offer, who ever makes the best (highest) offer gets it! Next week I will be going on holiday and I would like to sell it before to get some spending money. Want to sell today. Available for pick up in CARLISLE If you have any question, please just send me a message.