Pokemon, Magic and other card games are becoming more and more popular these days and some of these cards are quite rare and have a high commercial value.
GRAAD (but there are others) can certify your cards enveloping them into a pvc transparent container with a certification o quality and rarity.
But, to display these cards, a stand is needed.
I've already posted a simple display stand, this new one has a different and more finest design.
You can download it on Cults3D for free.
Here is the link: https://cults3d.com/en/3d-model/gadget/graad-and-spa-advanced-card-display
Enjoy