That experience cemented the first generation of Pokmon as one of my favorite eras of the game to collect, and while I have collected most of the commons and uncommons from the first three sets, I dream of collecting more of the Classic Stars Holofoils I admired as a child and a new collector (right now I just own Lapras, Vaporeon and Muk)
3 Trainer Trophy card is exceedingly rare due to the fact that there are only four of them in existence
However, this applies to all other models, colorways, and sizes
Generally, the older a card is and the better its condition, the more it makes sense to have it graded from a valuation standpoint
We dont know if these PSA cards are solely sourced from whats been sold to GameStop stores over the last year, or if the company is buying them in bulk from other suppliers, but a combination of the two would make most sense
If you want you can skip the colorful cardstock page and just add another decorative page