Drown in Filth is a fantastic example of this principle
Some of the most sought-after cards are either full art (cards with only art), EX ('EX' is next to the Pokmon name), or reverse holos (holographic sheen is on everything but the art)
It can't be countered, gives you an extra turn, and shuffles back into your deck if it's somehow put into your graveyard
GameStop's program is still in its infancy, so its overall consensus remains to be determined
Thats about the same as buying one of Magics 30th Anniversary boosters, which include unplayable reprints of Black Lotus and other Alpha cards
These can be gargantuan creatures, powerful Equipment cards, or devastating spells