About a month ago, Bloomberg got its hands on a letter from Amazon to third-party sellers indicating that it would stop selling Apple TV and Google Chromecast devices starting on October 29. They weren't lying. You can no longer find these items on Amazon.
The letter said: "Over the last three years, Prime Video has become an important part of Prime. It’s important that the streaming media players we sell interact well with Prime Video in order to avoid customer confusion.”
As Variety reports, the company has followed through on its plans. You can now search for Apple TV or Chromecast, and you'll be out of luck. You can still find items related to Chromecast, however, such as a book on how to set up (lol) and a mini USB power cable for the device.
Amazon still lists players that work with Amazon's Prime Video service, such as Xbox, Playstation, and Roku.
Of course, Amazon also sells its own direct competitors to Apple TV and Chromecast in the Fire TV and Fire TV Stick. In fact, these items appear at the top of the search results for searches for Chromecast and Apple TV.