Surprisingly, Google Nexus 10 is back to the Play Store Devices and is listed as Coming Soon!. It looks like a new stock of units will be arriving soon and will become available for purchase shortly.
The Samsung-made Nexus 10 went out of stock in last fall and has since vanished from the Play Store. but Now its back. The Play Store listing saying that the new stock of Nexus 10 will be running latest Android KitKat 4.4.2 Out-of-the-box, with no update required.