iPhone 4 - 16GB Black fully unlocked ?

Selling my unlocked 16GB iPhone 4 that is in perfect condition. The screen is literally flawless as it has had a screen protector on from day 1. There are a few minor scratches on the back but I always have it in a case (which is included). Comes with lead and charger. Unfortunately I do not have the box as it was in my parents house and has since been dumped/misplaced. I can meet up in the centre of London any evening (or potentially during lunchtime). Thanks