The prices for these rare cards (and truly all Pokmon cards) are constantly shifting
These counters can fulfill the modified conditions on cards like Kodama of the West Tree, they can be used to combat opposing -1/-1 counter effects, and there are even effects life Damning Verdict or Wave Goodbye that break symmetry if you can get counters on your own creatures
If you dont have any good targets you can hold out for Disruptive Stormbrood, a smaller dragon with only a 3/3 stat line but it does get to blow up an artifact or enchantment when it comes into play
(As long as this spell is on the stack, players cant cast spells or activate abilities that arent mana abilities.) Molten Disaster deals X damage to each creature without flying and each player
Furthermore, first edition cards are marked on the bottom left of the card art with a neat little first edition tag, so you can always tell them apart from their modern equivalent
If you are lucky enough to open a textured foil, you just pulled one of the most valuable cards, and even the base version has a decent price if you don't get the fancy art treatment in your pack