* Rarity: Some cards are incredibly rare, while others are common. A single rare card could be worth hundreds or even thousands of dollars, while a collection of common cards might only be worth a few dollars.
* Condition: The condition of the cards significantly affects their value. Cards in pristine, mint condition fetch much higher prices than cards that are damaged or have been played heavily.
* Edition: Different sets and editions of Pokemon cards have varying values. For example, a first edition Charizard card can be worth thousands, while a common Charizard from a later set might only be worth a few dollars.
* Specific Cards: Even within a single set, certain cards are more desirable than others. A holofoil card, for example, is often more valuable than a non-holofoil card of the same Pokemon.
To determine the value of your Pokemon cards:
1. Identify the cards: Look up the names and sets of each card.
2. Assess the condition: Determine if the cards are in mint condition, near mint, played, damaged, etc.
3. Research prices: Use online resources like TCGPlayer, eBay, and Troll and Toad to compare prices for similar cards in similar condition.
Remember: A professional grader like PSA (Professional Sports Authenticator) can provide a certified evaluation of your cards, which can increase their value.