Ipad

Many models can be traded-in - either for a discount against purchase of a replacement iPad - or in exchange for an Apple Gift Card:

Apple Trade In - Apple

For devices that are too old to be eligible for trade-in, Apple will responsibly recycle the device for free.

You may be able to trade in for a gift card or for a credit on a new purchase. You can use the following to get an estimate: Apple Trade In - Apple