Thanks for sharing! Looked at feedback profile of Ebay seller and found this: "Be careful, public key and privet key are not linked, no reply from seller"
Unfortunately, you usually get what you pay for when it comes to anything financial these days. Why try to save $25-30 on a product that you are more than likely storing at least $100+ starting out? Go with Ballet Wallet for this feature all day every day. I think with most things, any "replica" type products are usually not very popular/much skam, whereas new business ideas are highly welcomed in this space.
Right now my eyes are set on Trezor as they begin to pilot a new chip product of some sort with Tropic Square