Trade in value of iPad Air 5th Gen with slight bend

Apple will only accept undamaged/fully-functional devices for trade-in. As trade-in items are refurbished, the cost of repairing a damaged item will likely exceed its value.

You can verify eligibility and an estimated trade-in value here:

Apple Trade In - Apple

As an alternative, consider selling your iPad privately - either as a damaged item, or for parts. It may have value to someone.

As described, your iPad is very likely eligible for repair. Be aware, however, that the cost of repair will exceed any potential value for future trade-in.

For practical purposes, in lieu of repairing and returning your own iPad, Apple usually exchange the iPad for a renewed/refurbished iPad of the same model and specification. The cost of the exchange is the same as would otherwise be charged for repair.

For out-of-warranty repair, Apple offers a fixed-price price repair. You can verify eligibility and cost for your region/country here:

iPad Repair & Service - Apple Support