I really like the idea of a Bitcointalk tangem card! IMO Tangem is for now the best technology for this kind of wallet.
I totally agree. Private keys are embedded inside the card, hence there is no trust issue here (except of course trusting the Tangem company).
You can load & unload funds, pass the card multiple times to multiple different people, and never worry about the private key get exposed. I cannot recall if there is any other similar product that allows you to do the same. In opendime, you need to "break" it in order to reveal the private key and hence send funds. In hardware wallets, you always need your seed word or you PIN for sending funds (and hence you cannot pass those to other people along with your hardware wallet)
IMO one of the best offline crypto storage means of exchange (i.e. pass crypto funds, like old dirty fiat bills, without the need of the blockchain verification). Also very convenient, since with a single "tap" of the card you can instantly see the status of the card (total funds, if it was prior redeemed etc.)
total cost is $5 each (for 1000 minimum order) + 40$/50$ shipping + taxes.
reselling them for $8-$10 each (+shipping) might be enough for covering the initial ordering investment (even if you do not sell all of them)
Problem I see is that with 1000 custom cards there may not be a premium for collectors for years if ever.
That's true. However, this is not a "strictly" collectible item. Is something that you can actually use (usability), instead of just collecting it. It's not like placing an order for 1000 paper wallets, which you can load them once, seal private key with a holo and that's it.
Similarly to hardware wallets: You might want to acquire a limited edition version for collectable purposes. However, you might want to get an additional one for everyday usage