And for the most cash. Before you trade your iPhone 6, 7, or 8 in for whatever Apple reveals this week, here’s how to get your old smartphone ready to sell.

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Tomorrow morning, Tim Cook will walk across the stage at the Steve Jobs Theater on Apple’s new campus and introduce the next iPhone lineup. What he’ll show has been the subject of so much speculation that you’d think the new Apple campus housed the Oracle at Delphi.

Rumors tip an iPhone Xs, Xs Max or Plus, and Xc. While we can speculate on the size, features, colors, and even materials of the phones, one thing we definitely know is that they’ll be pricey.

Still, there will be fans lining up to buy the newest offerings. If you’re one of them, you’ll probably want to sell your existing phone to help soften that blow. But before you pack up your old iPhone and ship it out, you should know there’s more to the process than just handing it over and waiting for cash to hit your bank account.

Privacy concerns abound with phones, from photos stored in iCloud to personal data housed within apps, so wiping your phone before you hand it over to its next owner is a must. And don’t forget to back up, so you don’t have to manually re-download hundreds of apps on your new iPhone.

Below is our step-by-step guide to preparing your phone for sale, as well as a few reputable sites that will take it off your hands for top dollar.