NEW IPHONE 5 32GB BLACK ON 3 TO SWAP FOR NEW IPHONE 5 32GB WHITE ON 3 OR UNLOCKED ?

I HAVE A NEW BLACK 32GB IPHONE 5 ON 3 TO SWAP FOR A NEW 32GB WHITE IPHONE ON 3 OR UNLOCKED. I WOULD ALSO ACCEPT 599 (NEGOTIABLE) FOR THE IPHONE. NO TIME WASTERS OR SILLY OFFERS PLEASE. THANK YOU.