Pokmon card value is determined by: rarity (limited print runs), condition (PSA 10 commands premiums), historical significance (prototypes, trophy cards), iconic status (Charizard, Pikachu), grading (professionally authenticated), and market demand (collector and investor interest)
Collected Company is way too good at immediately rebuilding the combo threat after you just blew it up, and Heliod will of course survive most commonly played board wipes
Marketplaces like eBay or TCGPlayer take a cut from every sale, which can affect the final price a seller receives and a buyer pays
This is notably the first theme in the series that is solidly in three colors
Avoid third-party downloads
I'll break down the top cards worth opening, along with a few honorable mentions worth keeping an eye out for