What are my Pokemon cards worth?

It depends on how old the are. What condition they are in. And if they are rares. If they are from the early sets then they are worth more value. If they are in good condition then its better that way. And you can tell if they are rares if they have the star at the bottom right corner of the card. You can also look on Ebay the same card you have to see how much it goes for. Also check if cards are 1st edition. it'll say so on the card.