iPhone 4 16gb Black (02) Boxed Swaps WHY !

iPhone 4 16gb on O2 network and giffgaff in pretty good condition and comes with the box,charger,USB cable and headphones. The phone has carbon fibre covering on it however phone is still in good condition and in full working order Must go ASAP I either want 240 cash or can do swaps...Let me no what you have...07900334459 call or text me for more info Thanks