Original price: $4-10 per pack
Why Pokemon Cards were awesome: The Pokemon Trading Card Game came out in 1996. Pokemon was already popular on Gameboys, but the card game version brought the fun onto the playground, and the stakes were high. If you won a round, you got to keep the cards, and some of the rare ones are now worth thousands.
Back then, however, it was just about one-upping your friends and having the coolest Pokemon with the sickest powers.