Can Apple replace my scratched lens on my iPhone 4?

I recently lost my iPhone 4S and so just went out and bought a second hand iPhone 4 from a friend but the back camera is scratched.
Could a local apple store fix/replace this for me? And how much would it be?
The phone's out of warranty

APPLE store can surely fix it but this may be costly as to do that they will have to upen up the entire back of the phone and possable change it as the glass is normally attached to the back.did you know iphone has 20 miniature screws to open the back, ignore the camera scratch or sell this phone and buy another

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