Apple Account signed out and Find My iPad off, in front of you. If setup asks for the previous owner’s Apple Account, it’s still linked to them: don’t take it.
Battery: charge it for a while. If it heats up or drains fast, plan on replacing the battery.
Wi-Fi, the cameras, the speakers and charging.
Where to buy it
There’s no iPad Pro 12.9-inch for sale on Damjitech right now.