$200 with a two year plan
the 3gs is much better for it's money iphone 3gs is better, i think. but it is very dear. it seems that you have enough money. if not, you can buy cheap phone instead.
In the U.S a 3g costs $99 and the Iphone 4 costs $200
An iPhone costs about $US200-300 (On Contract)
Currently, on Sprint, the iPhone 4 costs about $99.
wait for iphone 5 and then get a 4 because they will be much cheaper
The fee is 30 dollars each month for the Iphone.
$299.99
I'm assuming this is old as the iPhone has been out awhile, but no there is no return policy with Apple or AT&T.
It does not exist yet the iPhone 4 does.
Probably less
Well it was said that the iPhone 5 would have a much thinner screen then the iPhone 4. Then the Iphone 5 would have more and better apps on it.