Like most Magic: The Gathering cards, the value of The Fire Crystal depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Final Fantasy)
They represented a missed chance at an actual decent card in your booster pack/box
A separate burglary in Corona saw thieves steal up to $20,000 in memorabilia, including Pokmon and sports cards, from a collectable card shop over the weekend
Helpfully, their website has a whole Events page, so you can see exactly whats going on
There are thirteen in total: Growlithe Arcanine Alolan Marowak Fletchinder Talonflame Litten Litten Torracat Incineroar ex Oricorio Salandit Salazzle Turtonator These are all the Water-type Pokmon cards in Celestial Guardians
This principle extends to the rest of the product lineup, too