Yes, of course they are worth more money! It also depends on what the card is and its rarity. You can search up a cards rarity online. You can sell cards on eBay (or any shopping site) for high price, and if its rare, or holographic or something like that, people WILL buy it :)
That all depends if they have been factory sealed, the condition, and the holographic cards you have. Some first editions are worth more than others. A factory sealed Charizard is worth over 1,000$ on ebay!
it depends if it is holographic, promo, rare or common
A 1996 holographic Japanese Mewtwo is worth between $20 and $200 depending on the specific model. Its overall condition also plays a large part in how much it is worth.
it cost 800$
it depends on how old it is . if it is a card from the 90s it is worth alot.
about 6-10 bucks
A couple hundred dollars.
i think about $100.00
i will say up to $100 to$150
holographic (aka shiny)
Holographic.
$15