Apple iPhone 4 16GB in black UNLOCKED ?

I have for sale a 16GB iPhone 4 in black which is unlocked. The phone comes fully boxed, with unused data cable, handsfree and plug charger. The phone has had a screen protector on the front and back from day 1, also been in a black bumper which comes with it. The phone is in mint condition. Open to sensible offers If interested please contact me Thanks