That gap is normal for Pokemon sealed products: the box price includes scarcity, sealed premium, and optionality, not only the average raw value of opened cards
At four mana, its able to be cast while still giving you mana up for protection, which is sometimes a lot better than casting Craterhoof Behemoth
However, they are possible to spot and if you are on your guard, you can prevent yourself from being taken in by these fakes and losing a lot of money in the process
Unfortunately, it's a bit too cumbersome to really punish decks in formats where multiple copies of cards are allowed, but it'll definitely show those Hare Apparent decks who's boss
GODEEPER: For detailed OP-16 competitive breakdown including tier list and key cards, see the complete OP-16 guide
Broadly speaking, Magic cards break down into one of two categories, permanents and non-permanents