No, it's not illegal (at least not in the USA). If you try to sell it with any third-party addons that enable piracy, that could be a different story. If people want to download movies without paying for them, they need to figure that out for themselves.
Why is it illegal to sell unlocked fire sticks?
But is jailbroken Fire Stick illegal? The answer is NO. Jailbreaking or hacking or unlocking your Amazon Fire TV Stick is definitely not illegal. It is purely legal simply because of the fact that it is your personal property.Sep 11, 2021
Can Firesticks be traced?
There is currently no mechanism for identifying and tracing lost Firesticks. Once it's gone, it's gone. There is also no way of identifying whether a Firestick on sale on the internet is stolen either. You will only know once you try to register it with your account and it won't let you.Mar 8, 2020