Scarcity Cards produced in limited numbers or discontinued sets are naturally more valuable
The card may still have minor imperfections such as small edge whitening, print
But for the casual Commander player looking to add some Rakdos-flavored chaos to their deck, this is awesome
It's theoretically possible that, if you were to weigh literally thousands of packs to choose your heavy favorites, and bought hundreds of them, you might get a slightly higher pull rate of rare cards than if you bought the same number of random packs - but I don't recommend it, for two main reasons: Most game stores don't permit you to weigh individual booster packs before buying them - mostly because it takes a long time and holds up the line
Using The Princess and the Frogs Friends on the Other Side song which can be actively sung by the player when used, if they so wish to I was able to draw two additional cards, thereby maintaining the already speedy momentum I had built up and helping me win the game