Whether it was through numerous trades, being kept in shoeboxes, or brought to school, its likely that many amateur collectors saw their most valuable Pokmon cards lost to time (or garage sales)
"Fortissimo the Mobile Fortress" and "Meklord Astro the Eradicator", which feature Aporia (although blurred out in the latter)
If your deck contains a bunch more energy cards, then the Tiger becomes more attractive
Despite what sets them apart from each other, both of these Pokemon are incredibly powerful in their own ways, with Garchomp as a master of the physical realm, with Giratina representing the same for its dark dimension
Think of it like this: a price checker gives you a ballpark figure, but you need to do a little detective work to pinpoint the true value