samsung galaxy s2 sale or swap !

I have a samsung galaxy s2 for sale. comes with box, charger, cable memory card, etc... It is samsung factory gsm unlocked, so works on any network and also have legitmate paper work for the phone. The phone however has a tiny mark on the top left corner of the case(hence open to offers), as you can see in the picture, but the rest of the phone is perfect with the screen always been used with a protector and will include a new one with it. would like to sale or swap with an iphone 4. if you are interested feel free to contact me or text me and I will get back as soon as I can.