It looks like the reports are true regarding the fate of Google's Nexus 7. You won't be able to find the tablet anymore in the Google Store as it has officially been discontinued since last Friday. This has been coming about since last fall, after the release of the Nexus 9, so it's not really a surprise. While you can probably still find one if you look really hard, removing it from the Google Store lessens its availability.
The Nexus 7, which was manufactured by ASUS, has gotten pretty good reviews since it was first released back in 2013. The 7-inch tablet was packed with all the great functionalities we expect from Google devices, but it was made extra special by the fact that it was sold at a very affordable price. It was even able to receive an update to Google's latest, Android 5.0 Lollipop (even if it was apparently buggy).
But as with a lot of gadgets, everything must come to an end. The arrival of the Nexus 9 last fall signaled that the days of the Nexus 7 were all but over. When Google pulled out the Nexus 5 from the Google Store, we all knew it was just a matter of time before the Nexus 7 followed suit.
But if you still really, really want one, you can probably still find a few units being sold in sites like Amazon or eBay. You should probably do that now, as its unavailability in the Google Store means its days are really numbered.