What is the no contract cost of the iPhone 6?

The iPhone 6 will be available off contract, which means prices are unsubsidized. The pricing commonly listed normally assumes a two-year carrier contract.

No-contract pricing on the iPhone 6 is as follows:
iPhone 6 - 16GB - $649 USD
iPhone 6 - 64GB - $749 USD
iPhone 6 - 128GB - $849 USD