Pokmon cards worth the most money overwhelmingly tend to be from the 90s, such as the iconic Base Set Charizard which has sold for as high as $420,000
Cards like Angel of Despair, Simic Sky Swallower, Murkfield Liege, and Karmic Guide, and Mirror Entity lost around half of their value due to their commander printings, and as of yet, none of these cards has significantly recovered in value
Value in the Pokemon TCG comes from the intersection of several factors: The Factors That Actually Drive Value Rarity tier - Yes, higher rarity generally means higher value
These examples offer a glimpse into the rarity, quality, and structural precision that define the collection as a whole First Ever Graded Pikachu Illustrator Pikachu Trophy Cards Super Secret Battle Trophy (SSB) Tropical Mega Battle Trophy (TMB) Kangaskhan Family Event Trophy University Magikarp Snap Contest Cards Master Key VS T.M.B
It is not as expensive as other ex cards in other expansions, but it is still a pricey Obsidian Flames card to have