Simple really don't deal with someone who has not known manufactures of hardware wallet because it is better to spend higher on recognized sellers than buy on those cheaped products which dealers are not legit and might be a scammer. And never make a transaction with those always demanding pay as early as possible even though you have not yet agreed to the terms of the transaction. And the last one before the final agreement makes sure that each transaction has an assurance and guarantee that an arms-length transaction will be done.