So, does this work? We cant say yes or no for sure, but many handheld detectors are sensitive enough to catch trace amounts of metals in dirt. The latest rumor which we have heard is that some players are using handheld metal detections in order to determine if rare cards are present. Are There Any Other Methods For Finding Rare Pokemon Cards If Google Search data is anything to go by, on average, Pokemon is about as popular as the NBA. new video games, but has never severely declined in popularity. It’s had its “explosions” of attention with the releases of e.g. Since its origin in 1996, the Pokemon franchise has maintained a steady if not slowly growing popularity. Cards that are highly playable are often valuable, but only for a short period of time… when newer, better cards come out they usually lose a lot of their value.I am referring specifically to how rare a card actually is in the world, not its rarity. Generally, how rare any specific Pokemon card is often has a lot of influence on its’ market price.A perfect card can be worth 2â10x more than the exact same card with a tiny imperfection that can only be seen with a magnifying glass. The condition of a card is critically important.Older cards â especially those from the first ever sets â are generally more valuable than newer cards.The Pokemon card market is just like any other open market: everything depends on supply and demand.