How much is it to upgrade from iPhone 5 to iPhone 5S?

I have Verizon and it says I'm eligible for an upgrade and I would like to get the iPhone 5S. How much would I pay as an eligible person for an upgrade as opposed to someone who isn't eligible for an upgrade?

Go for an Android phone much more better than iOS.

If your contract is up and you trade in the 5 and get a new contract, then I bet its free since 5 is worth more then that.

To trade in your old iphone and buy a new one:
1) Go to Apple store with your iPhone.
2) They check it out and will give you a price for it.
3) If you like the price then the wipe your old iphone and get a new iphone.
4) In some cases an old iphone may be worth more then the contract price of a new one if you get it on contract there. In that case they give you credit for it. In this case you basically get a new iphone free.