Being older doesn't necessarily make a card more valuable, as Pokémon cards were widely collected. There are modern cards that are just as valuable or even more valuable than many older cards, but there are some exceptions (mainly cards with limited print runs, like 1st edition Shadowless holos, and Japanese-exclusive "trophy cards"). (Basically cards that even older collectors are less likely to have.)
This one's been going for about $12 ungraded.