A brand new factory unlocked iPhone 4S is pretty pricy from the get-go, however you can get some money off if you choose to purchase from go4computers
. Apple sells the factory unlocked 16GB iPhone 4S in white or black for $649 per unit on their Web site
. The current go4computers price for the 16GB iPhone 4S in white or black is $619 per unit. That knocks $30 off of the price from Apple's Web site.