Apple has started selling refurbished versions of the iPhone 8 and iPhone 8 Plus from last year. You can find both in its online store. The refurb iPhone 8 with 64GB of storage can be yours for $499, which is $100 less than its regular price. The 64GB iPhone 8 Plus in refurbished form is $599, also $100 less than if you get a new one. All units are unlocked and should work with all the big four US carriers. Keep in mind that these are units refurbished by Apple itself, which means you they're tested, certified, cleaned, given a new battery and outer shell, and come with a one-year...
Source: https://www.gsmarena.com/apple_is_selling_refurbished_iphone_8_and_8_plus_starting_at_499-news-34045.php