gyrados pokemon card - Gyarados - 6/102 - Holo Rare Water Water Distilled Blast (30+) Reveal the top 7 cards of your deck Gyarados - Ancient Origins #21

Thats a full reset

Plus, they still get triggers when hitting a Battle and seem to be in the two best Battle colors to start with

Its two elements are the legendary crown that was introduced in Dominaria and a column reminiscent of the one from Legends , the set that introduced Legendary Creatures and an inspiration for this set

They have a vested interest in maintaining/expanding their business so just like card grading companies, they understand it's ideal for them to "create value" out of nowhere and if an auction sets a new record, it's not like they have to worry about due diligence to see if the price made sense or who the seller and buyer are and if they have a preexisting relationship or what, they just take their cut and that's it.