It feels like just yesterday that kids were running around the playground trading Pokemon cards, but it was all the way back in the late '90s. Even back then, the ferocity with which kids sought out new cards was intense. That same energy hasn't seemed to abate over the years - original Pokemon cards from the '90s are now worth more money than ever. If you've got any tucked away somewhere, it's time to sell.
A first edition Raichu goes for around $5,000 and a Pokemon Master's Key sells for a jaw-dropping $10,000. We can even go one better: an original 1998 Magikarp has been known to sell for around $15,000. Original base sets, such as Charizard, Machamp, and Blastoise are all fall in the $2,500 to $3,000 range, while trainer cards can go from around $1,000 to $4,000.