Both the original Moto 360 and Sony Smartwatch 3 are no longer being sold at the Google Store. The listings for both products are still live, but the 'Buy now' box is greyed out with a message indicating that the watch is no longer available. Motorola has already announced, and released, a successor to its original Moto 360, and the newer version is available in your choice of configurations from the Google Store. As for the Smartwatch 3, we have yet to hear any news on a new watch from Sony at this point.
If you were looking to pick up either of these watches, cross the Google Store off your list of retailers that you can purchase from. You can still grab the Moto 360 from Amazon for as low as $140, or the Sony Smatwatch 3 from Amazon for $195.