There are signs of the market cracking prices of singles are coming down, sealed products are coming down
While other cards over the years have featured effects similar to this (mythic rare Zur, Eternal Schemer from Dominaria United comes to mind), Opalescence was the first to do it en masse for enchantments, and, due to its novelty and being first on the scene, it clocks in with a price point approaching $30
The only downside is that Water Arrow costs three Energy to use, but you can supplement this with Misty
If you're not a fan of this style of Blaziken, there's another fantastic version to come that might strike your fancy
For holos, compare to a known Unlimited copy if you can, the shadow jumps out when two cards sit side by side
Most Fairy-type Pokmon are now using the Psychic type and Pokmon that previously were Psychic but are Poison typically are now Darkness typed