I have an iPad that I've had for a while and don't use. It's clean and has a small crack that doesn't affect the touch and it works fine.
iPad Pro 12.9-inch
* 1st Generation
* Wi-Fi only version
* Screen: 12.9-inch Retina
* Resolution: 2732×2048
* Processor: Apple A9X
* RAM: 4 GB
* Storage: 32 GB
* Supports: Apple Pencil 1st Generation
* Supports external keyboard
* Has 4 stereo speakers
* Rear Camera: 8MP