This is a bargain when you consider comparable cards: for example, Sylveon V alt (another Eeveelution from the set) is already above $120, and even Glaceon V alt was around $120 as of late 2024 (bleedingcool.com)
Of course, Jumbo Cactuar will have a big ol target on its spikey back as soon as it hits the battlefield, so its worth attaching indestructible or hexproof to it to prevent it from reaching an early grave
The newest set, OP-16 "The Time of Battle" (June 2026), is the clearest modern example of how rarity drives value: it carries three Admiral Manga Rares (Sakazuki, Kuzan, Borsalino) at the top of the structure, the rarest and most expensive cards in the set, while the cards you actually need to build a deck sit at Common, Uncommon, and Rare
Hope some of you find this as satisfying as I do