Is the iPhone 13 mini eligible for iPhone 17 trade-in?

There is no iPhone model specific trade-in.

You can trade in any model accepted iPhone model for a discount on any other iPhone model currently sold by Apple.

The only exception to this are current models which are not accepted for trade for other current models.

So yes, you can trade in an iPhone 13 and get value towards the purchase of an iPhone 17.

You don't get a 1 to 1 trade if that is what you are asking, you still need to pay the difference between the value of the iPhone 13 and the price of iPhone 17.

You can enter the details for iPhone model to be traded in in the new iPhone's purchase process.

click here ➜ Buy iPhone 17 - Apple

Yes. In the US, you can get up to $150 for it in good condition.

Apple Trade In - Apple