JJG, yes, that's it. I think the $50 was a kickstarter deal, they may be more now. The first few production batches were sold out. Yes, BIP39 comparability, seed words, easy (hopefully) to restore to another device in case of disaster. The damn thing comes sealed in a bag that changes color if it's opened, the bag's serial number is in the firmware (tamper-proof, proof).

Much more than I can relay is here:  https://coldcardwallet.com/docs/

I was pretty happy with Ledger Nano S, glad to see ledger-live instead of Chrome extensions. I use it only on several Linux variants, but even on latest updates, the USB comm is messing with something. It's killing X, but the OS is still alive underneath. Chrome extension seems to work fine, but I am leery of trusting Mega-corp.

Little nit-picky stuff on the Nano S?  The whole thing physically is a little 'wiggly'. The buttons don't seem physically robust. I would not expect it to take rough treatment. Nano S also has native Electrum support, but I haven't tried it yet (even though Electrum is my favorite software wallet. Paper has been preferred so far, but it was  hassle to sweep the whole thing to extract shitcoins.

The Coldcard has no moving parts, the buttons are all capacitive (sp?) touch (with adjustable debounce and sensitivity), and a much better/bigger display. I think you can pretty much reset anything/everything on it, unless you use the BURNME PIN, that destroys the device.

I'm happy to see that Coldcard has source code available, and encourages home-grown extensions. That of course opens idiots to someday installing bad custom firmware (BUT THEY SAID IT WOULD CURE CANCER!). Conversely, Nano S pretty much just said "it's all a secret. Trust us".

Disclaimer: I am a hardware wallet newbie. Nano S/Coldcard are my only toes in this water.  There are plenty of others. We are obviously at the tip of the iceberg, on what hardware wallets will someday become. I hold/acquire crypto, I'm just trying to learn. I don't really need hardware wallets. Yet.

There are a few reasons why a multiple to spot markup wouldn't really be possible with a platinum binary round vs gold binary round.  For example, the designs of the gold and silver are nearly identical.  I even had the binary spell out Golden to match the characters in Silver so that it would be a simple design edit.  Platinum would require a larger redesign.  I also have 1 of the dies on my binary rounds that can be reused, so the 2018 rounds only required 1 of the dies to be edited/crafted.  A platinum version would need 2 entirely new dies, with both requiring a redesign.  Then there is the cost of blanks, which can actually be higher than gold blanks due to their rarity (not sure if this is true for a 1oz blank, but it certainly is for the size I'm having made for my upcoming round).  Finally, the minimum minting costs would apply equally to platinum/gold and not be based on spot price.

I hope that explains why I wouldn't be able to offer a platinum round for $1,360 without taking significant risk and hoping the exchange rate went my way.  Maybe if I took pre-orders I could get the price down below the $1,600 I suspect I'd have to charge, but this would be more about pleasing customers than anything else, so there would have to be demand for it.

Creator-funded, though I don't see a serial #. (I don't remember what the variants were.)

Thanks for the feedback guys, it's under the terms of service on the checkout page. There is no flying under the radar. The site is owned by Blue Diamond Exhange LLC an Oregon Corporation you can check the registration with FinCen. It is possibly the only female-owned exchange in the nation. Thank you for this information. We will work on getting an "About Us" page up.