Like most Pokmon cards, the value of Eevee depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Prismatic Evolutions)
Type: Character /Cost: 4 /Power: 6000 /Trait: Navy
Card prices are up 570.4% all time, up 5.2% over 30 days, and up 3.6% year-to-date
The other thing that happens in your 30s and 40s is having kids, which also triggers the nostalgia receptor. When trading cards reach their vintage age (around the 25-year-mark), Turner said it sees a surge of demand for authenticated and graded copies of these items, and the scarcity of the perfect and near-perfect cards helps drive the value of the market
Let me know in the comments or on Draftsim's Discord if thats more your style
Im digging through Magic s history again, orienting around the card types and how theyve changed and evolved over time