* Condition: The condition of the cards is the most important factor. Mint condition cards are worth significantly more than cards with scratches, creases, or other damage.
* Rarity: Some of the original 150 cards are much rarer than others. For example, a holographic Charizard is worth far more than a common Bulbasaur.
* Dark Evolved Pikachu: The "Dark Evolved" series is a more recent set. The value of this card will depend on its rarity, condition, and market demand.
* Market Fluctuations: The value of Pokemon cards can fluctuate based on demand, releases of new cards, and other market forces.
To get a realistic estimate of the value, you'll need to do the following:
1. Identify the cards: Make a list of all the original 150 cards you have, including any holographic or rare cards.
2. Assess their condition: Determine the condition of each card using a grading system like PSA or Beckett.
3. Research market values: Use online resources like eBay, TCGPlayer, or PriceCharting to see what similar cards are selling for.
4. Consider the Dark Evolved Pikachu: Research its rarity and condition to estimate its value.
Once you have this information, you can get a more accurate idea of what your collection might be worth. You can also contact a professional card appraiser for a more in-depth evaluation.