This is one of those tricks where I understand that you pay for the method, not the material. The
performance is very cool, although you need to do it under certain lighting conditions. As I said,
the material leaves a bit to be desired as the holes are not very well done, with paper burrs, and
the black stickers are poorly placed and do not fit well in the holes. But, once you've paid and you
know the method, you can make your own set correctly, and even improve the included material to make
an exceptional performance.
My cards were okay. Cut holes and stickers were a little mismatched but not noticeable to laymen. I agree with you that it is very easy to make your own. I ordered a couple of items from Amazon so now when the cards wear out, I'm not spending money to buy the whole trick again. Here is what I'm using from Amazon:
https://www.amazon.com/gp/product/B07QLNTG5B/ref=ox_sc_act_title_1?smid=A323SNUEHJJ6FB&psc=1
https://www.amazon.com/gp/product/B07SBJQDDZ/ref=ox_sc_act_title_2?smid=A2VIYIGMD19XOL&th=1