Why would you want to get a second-hand device? OP hasn't answered this very valid question. To save a few bucks?
And let's follow that thought through. Is it really worth risking everything you have in order to save a few bucks? I'd never do that.
Generally speaking, I think one could probably get away with buying a used hardware wallet, but why would anyone in their right mind take the risk? I'd NEVER put my Bitcoin at risk like that. Never, never, never. Not even if I could get a used hardware wallet for free. No way.
I'm sure, I wouldn't buy a second-hand hardware wallet. I'd rather build my own from non-suspicious electronic parts (Seedsigner or Krux; awesome stateless hardware wallets; no revealing purchase traces).
Absolutely. In my opinion Krux is much better than most hardware wallets for singlesig, because it offers encrypted seedQR codes (among many other features). And I think SeedSigner is better than most hardware wallets for single-custody multisig (in other words, multisig wallet for one person) because of how easy it is to load multiple seeds. Either would be a great choice for a collaborative multisig wallet (where each person holds a key).