The answer
Factory resets reduce but do not eliminate supply-chain or tampering concerns. A genuine device and trusted firmware matter more than the reset alone.
What to do next
Prefer official sellers; verify device authenticity and generate new backup words on the device.
Trezor hardware wallets
Hardware wallet related to device/backup security; not a guarantee of recovery or anonymity. Availability, supported assets and local eligibility must be checked before signing up or buying.
Visit Trezor hardware wallets ↗Official provider link · Compare suitability and availability before choosing.