According to the apple store website, the only version for an unlocked iPhone 4s is 16gb and on AT&T....no longer available through them for Verizon or Sprint. And the price is $549
http://store.apple.com/us/browse/hom...phone/iphone4s

I don't recall the original 4s prices but I see it's priced higher at bestbuy, @ $699?
http://www.bestbuy.com/site/Apple%26...t_desc=REPLACE