iPhone 3GS 16GB UNLOCKED Good Condition *

I am selling my iphone 3GS finally as I have saved only for the iphone 4! 16GB UNLOCKED TO ANY NETWORK It is in generally VGC except that the silent button is playing up a bit (there are ways of getting round this) and the internal phone call speaker/earpiece/proximity sensor have stopped working. I just make phone calls on loudspeaker. Otherwise I had the screen replaced about a month ago, so that looks as new, and the back is in standard condition with only one or two visible scratches (and only scuff marks). The phone is quick and running iOS6 no problem. Comes with box. SENSIBLE offers will be considered.