Its due to their age and limited availability
Theres something to be said for cards being pumped (like the Drowzee IR) simply because of a planned buyout, or cards losing tons of value because they were never popular Pokemon to begin with
Types of Cards You Can Collect: Common & Uncommon Found in every booster, perfect for building sets Rares & Holo Cards These shimmer and shine, often with special powers Full Art & Secret Rares Ultra-valuable and visually stunning Promo Cards Found in tins, boxes, and giveaways Vintage Cards Old-school sets like Base Set, Jungle, Fossil Graded Cards Authenticated and rated, often by PSA What Should You Buy First
No, Growth Spiral doesnt go in Amulet Titan
For example, the Umbreon VMAX prize pack card fetches well over $100 on secondary marketplaces