Check the rarity symbol at the bottom of the card
Circle means common
Diamond means uncommon
Star means rare
Look for holofoil or reverse holofoil finishes
Check if the card is a secret rare
Look for a card number higher than the set number, such as 110/108
Check for full-art, alternate art, or special illustration cards
Look for promo stamps or special event markings
Compare the card to the official set list
Check if the card has a first edition stamp
Look for low print-run or limited-release cards
Check recent market prices and sales
Verify the card’s condition, since condition affects value
Use a reputable price guide or card database
Check whether the card is from an older or popular set