Pokemon TCG Cards That Used To Be Valuable And Lost Their Price Origin and estimated value of gold Pokemon cards? Question Elite Fourum Mewtwo EX (Full Art) XY Evolutions Pokemon Found out these are valuable. Do older cards ever go down in value? : r PokeInvesting Admittedly, I have ZERO interest in Pokemon cards etc. That being the case, I'm trying to understand what makes a Pokemon card go up or down in value outside of demand? It's Hobby Education: The Definitive Pokmon Cards of the 2010s