The best buy right now are the Eeveelution Premium Vmax Collection Boxes. There are three variations (i.e. Flareon, Jolteon and Vaporeon) and are equally good purchases. By grading the promo cards and oversized promos along with opening the packs, there’s a lot of opportunity in the Pokemon Market right now in 2022. Many of these promos go for several hundred dollars in PSA 10 and in PSA 9 they are roughly $40-$70 which nearly covers the cost of the collection box itself.
Another play are the Reshiram and Charizard GX Collection Boxes for the same exact reason.
I have several of these products available on my TCG Marketplace aka https://kantoshark.com
Please reach out to me if you have any questions or comments on this investment right now in Pokemon cards.