I like these! I have thought about doing something similar for my coins as slabbing hundreds of coins that I will never sell seems a waste of sats but it is also essential so I keep it on my "to-do" list but it also keeps getting pushed down the page.
what will your prices?
and are you doing the printing or are you having someone print for you?
I am printing them myself. Due to how the text is done I cannot outsource them, and it's a bit labor intensive. With the coin capsules they will be 7-10usd each.
If anyone wants them without the text I can do them a lot cheaper.