How much are the cheapest iPhones?

I'm getting an upgrade next week and I don't wanna get it too expensive. If it's too expensive, then I might get a different phone.

The new I-phone 5c is being advertised for $99 with a 2year.contract in my area. The 5c is $550 without a 2year.contract. The new upgrade I-phone 5s is being advertised for $199 with a 2year.contract, or $650 without a contract.