A Kindle book I was attempting to purchase is listed as "Item Under Review," and "This title is not currently available for purchase." Amazon support was not able to tell me when it would be back or for how long it had been unavailable.
When I looked up the page on the Wayback Machine, it appears that the same message was displayed on July 27, 2017. It seems hard to believe that the problem has remained unaddressed for at least three years. Is it possible that this change to the page is recent, and the Wayback Machine is anachronistically integrating it into its archived versions of the page, or is the archived page conclusive evidence that the book has been unavailable since that date?