Dude before replying why not read the actual thread and then do your research.
The cheapest iPhone 4 currently actual handset price direct from Apple is $797;
http://store.apple.com/uk/browse/home/shop_iphone/family/iphone/select?mco=MjU1NTYyNDA (converted to USD).
The problem is when you think about prices, you think of the subsidized price.

Do you really think Apple sells a new iPhone to AT&T for $199! Nope, they get the FULL PRICE of close to $700, then the carrier discounts the initial handset to you, and then takes the rest back over 24 months via your bill. Both Apple and the Networks will get the $700 from you one way or the other
You should never be tied down to your Network although because America is such a big country I understand depending on where you live you maybe. But the unlocked handset only price is the important one. If you lose your next iPhone or drop it in the sea and need to replace it without insurance this is the cost you will be paying.
So will the next iPhone cost $800 sim-free without contract? Hell Yeah!