Will I have to pay a fee to get my iPhone 5 lock button fixed?

My one year warranty ends in November but I have a little crack in between my flash and camera. It's right where my mic is but honesty it doesn't really affect anything on my phone. My main concern is my lock button. If I can't get a completely new product like some of my friends have gotten, can I just pay for the lock button portion? It said that it could repair that specific piece possibly. If so, how much is it usually?

If the phone is still in warranty (which it is), you might be able to get this fixed for free - it would depend on whether you could convince them that the problem was a defect, and not damage that you caused. It's hard to say if that will be easy or not, but you should try, since if you're successful, you won't pay anything! And if you do have to pay, you really won't know exactly how much until an expert examines the phone.