How much does a locked iPhone 4S 16GB cost in USA?

My friend bought an iPhone 4 64GB for $400, but it was locked, and she got it unlocked here easily.
How much does a locked iPhone 4S 16GB cost? I ant the price for the locked one, not the factory unlocked one or anything, I know about that stuff.
If anyone could check the price on a local mobile store, which would probably sell it at a price cheaper than that at the iStore.

If I was you I'd wait for a bit longer like a month or two because iPhone 5 is coming out and when that does the iPhone 4s would be very cheaper than what it is at the moment'

He took a break in Dec and she had a dream in which she saw him sidelined from work and the earliest reports wrote the exact same thing-sidelined from work!

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