user37818: I just got a good price from eBay on a supposedly never-used Trezor hardware wallet.  I have no specific reason to think this would be dangerous to use, but I'm being cautious and ask here first:

Are there any reasons why it would be unsafe to use a second-hand Trezor to store my BTC?
Is there any way the previous owner could retain access to it and get at my coins?
Any other risks to a used hardware wallet I should be aware of?


user36068: If you update the firmware you are probably safe, but why take the chance? The Trezor itself (or even the included USB cable https://www.wired.com/2014/07/usb-security/) could have been corrupted/replaced by a sophisticated actor.
If someone gave me a used Trezor for free, I would throw it in the garbage. No discount would be sufficient enough for me to justify buying a used Trezor:
https://www.reddit.com/r/Bitcoin/comments/2dbjd9/trezor_tamper_proof_seal_doesnt_help_much_against/

37818: <p>I just got a good price from eBay on a supposedly never-used Trezor hardware wallet.  I have no specific reason to think this would be dangerous to use, but I'm being cautious and ask here first:</p>

<ul>
<li><p>Are there any reasons why it would be unsafe to use a second-hand Trezor to store my BTC?</p></li>
<li><p>Is there any way the previous owner could retain access to it and get at my coins?</p></li>
<li><p>Any other risks to a used hardware wallet I should be aware of?</p></li>
</ul>
 36068: <p>If you update the firmware you are probably safe, but why take the chance? The Trezor itself (or even the included USB cable <a href="https://www.wired.com/2014/07/usb-security/">https://www.wired.com/2014/07/usb-security/</a>) could have been corrupted/replaced by a sophisticated actor.</p>

<p>If someone gave me a used Trezor for free, I would throw it in the garbage. No discount would be sufficient enough for me to justify buying a used Trezor:</p>

<p><a href="https://www.reddit.com/r/Bitcoin/comments/2dbjd9/trezor_tamper_proof_seal_doesnt_help_much_against/">https://www.reddit.com/r/Bitcoin/comments/2dbjd9/trezor_tamper_proof_seal_doesnt_help_much_against/</a></p>
