Hello my friends.
Is that safe to buy a used hardware wallet like Ledger Nano S or Trezor .
Is there any danger to use a second hand hardware wallet ?
err.. I'm not sure if there's something the previous owner could do to steal your keys/bitcoins but if I were to use a hardware wallet for my investment, I definitely wouldn't risk getting a used one.
Value your investments. Get a new one instead, don't risk having potential big problems in the future.