For that price range, Fire TV 4K box (think its on sale for $45 right now) or Mi Box, also on sale at Walmart. Fire TV doesnt technically run on Android TV, but it will run everything you need. Mi Box is technically missing the Amazon Video app (although there are workarounds)
Consider Chromecast?
Firestick...£20...you wont look back👍
you get what you pay for. that's me pointing you in the right direction.
You'd want a MiBox.