I recently hacked together a "parental control" filter (e.g. "block Roblox after 9PM) by way of PiHole and some shell scripts. As the name implies, these usually run on a RaspberryPi, which have been impossible to find.

I picked up an ODROID C4 from Ameridroid and have been really happy with it. It lacks WiFi, but it wasn't necessary for my purposes.

I'd love to be able to get Pi Zero W, but not enough to scour every third-party dealer's site hoping they're in stock.