What is a iPhone price?

In America

iphone 3GS (8gb) - FREE (with contract for AT&T)

iphone 4 (8gb) - $99

iphone 4S (16gb) - $199

iphone 4S (32gb) - $299

iphone 4S (64gb) - $399

Unlocked iphone 4S (16gb) - $649

Unlocked iphone 4S (32gb) - $749

Unlocked iphone 4S (64gb) - $849