Hello ava_pett,
It sounds like you're looking for service options for your iPad. As you mentioned it's an older model you can check to see if it's listed as obsolete or vintage here: Obtaining service for your Apple product after an expired warranty - Apple Support
If listed it's likely the device wouldn't be eligible for a trade-in, however you can follow the directions here to have it recycled in an environmentally responsible way. Find more from the website here: Apple Trade In - Apple
For further assistance with purchasing, reach out to the Apple Support sales team directly.
Contact - How to Contact Us - Apple
Cheers.