Ashish Pithadia

Depends on Where you are in the world

In US at an Apple Store genius bar an Out of Warranty Exchange 5S unit is $269

Where was it purchased?

You will have to take it back to the country of purchase to get it replaced.

Then you will have to ask them

My iPhone is not eligible for warranty service. What are my service options?

There are two service options for an iPhone that is not eligible for warranty service:

1. Battery Replacement Service

   If your iPhone requires service due to the battery’s diminished ability to hold an electrical charge and it is not covered under Apple's warranty, the AppleCare Protection Plan, or statutory consumer rights, please contact an iPhone Authorized Service Provider.

2. Out-of-Warranty Service

   Please contact an iPhone Authorized Service Provider for out-of-warranty service options.

I should have added this is Apple guidance for Out of Warranty service in India