At that price point shopping used and local might be the best move. I see these devices come up pretty cheap as people switch to "jailbroken" firesticks, smart tvs, or other smart device ecosystems (ex. Google to Amazon).
If you haven't seen it already you might want to check out the LTT video on Android boxes. It basically talks about cheap Android boxes containing malicious materials and advising people not to connect them to their home networks.