Cracked camera glass on iPhone 13 Pro for Apple trade-in

Take a look here, if you're in the US:

Apple Trade In - Apple

When I run the process, it estimates a trade-in value of $95. That value may change once the trade-in partner examines it. If you have an Apple Store in your area, I'd recommend taking it to them for an on-the-spot quote. No issues with your iPhone getting lost or the trade-in partner not correctly evaluating your phone.

Regards.

Only Apple could answer that, but there is a good chance if they do the price will be reduced.

Who ever takes it in trade will need to open the device and replace the entire camera module (all three cameras). Individual components cannot be repaired or replaced. I suspect it will not have any value for trade in or at best nominal as varjak paw suggests.