Today Apple started selling refurbished iPhones on its website. They’re available with a one-year warranty.

Apple also sells refurbished Macs, iPads, and iPods. But at Apple the iPhone is king. In Apple’s most recent quarter, 60 percent of revenue came from the iPhone. Apple has sold more than 1 billion iPhones since the company came out with the first edition of the phone in 2007.

This represents a new way for Apple to gain revenue through its iPhones. It comes after three quarters of iPhone sales that declined year over year.

Currently the iPhones Apple is hawking online go for up to $110 less than the price of new versions of the device. Only iPhones 6S and 6S Plus models are available; nothing is newer or older.

Apple says these phones are fully tested, updated with replacement parts “for any defective modules identified in testing,” cleaned, inspected, and repackaged with cables and other materials you get when you buy a new iPhone. The phones run either the operating system that they originally shipped with or a newer version.

You can check out the refurbished iPhone inventory here.