Pre-Order If You've Locked in a Great Trade-in Price
If you've got an iPad (or another tablet) in great working condition and you're able to lock down an excellent trade-in price, go ahead and put in a pre-order.
Sites like NextWorth are buying old iPads and Apple itself has gotten into the trade-in game. Trading in your current tablet at the right time can help you save some money on your next device.
Trade-in prices often fluctuate when new models come out, but if you can find a great trade-in price that you're comfortable with before the iPad Pro release date, you might want to go ahead and put in your pre-order.
Locking in a trade-in and pre-ordering also ensures that you can get the iPad Pro model you want and get it in time to transfer all of your data and then send the old one in before the time runs out without being rushed.