How much does it cost to get a iphone 4s without a contract?

I currently have a no contract plan on at&t. I'm not willing to pay for a 2 year contract. I have been searching everywhere (Amazon, Ebay, Craigslist, even pawnshops). The phones range from 150-400. Could someone help me. How much is the actual price that I should be paying for a 8 or 16gb Iphone 4s to use with my at&t plan. I currently have a android phone and it sucks (Not my style of OS).

Got mine for 200 but that was like half a year ago

A new one would cost you $450 but its not worth it. You can look on Craigslist for a used one for around $180.