How much will the iPhone 6 & iPhone 6 + cost?

This is my first time getting an iPHONE. And I don't anything about the prices because of different plans. How much will it cost for the uncontested ones? Which is the cheapest way? It says that the iPhone 6 starts from $199 but in other sites it's like $600. Can someone please clear this up for me?

The $199 would be with a 2-year contract, the $600 would be the full price with no plan and no discount.