If you play with collectible card games like Magic and Pokemon (or others), I'm sure that you already know that some card has a very high evaluation.
Think of Charizard on Pokemon or Black Lotus on Magic The Gathering.
Trading these cards or simply collecting them could bring to you, in some cases, also fame.
But people is not always good and there are scammers which sell falsified cards.
Actually there are two authorities (GRAAD and SPA) which are able to certify the cards and also they enclose the certified ones into a transparent envelope.
I've created two displays which have a slot where you can insert the cards which will stay upright so you can show the certified cards to your friends.
There is a simple display and an advanced display.
This is the simple display
This is the advanced display
both are printable with every 3D printer (but i suggest the SLA/DLP/LCD with transparent resin).
The 3D models are available here for free.
https://cults3d.com/en/3d-model/gadget/graad-and-spa-advanced-card-display
https://cults3d.com/en/3d-model/gadget/graded-cards-support
Enjoy and if you like them remember to buy me a coffee ;)