1 Box = 15 packs
Picking at random isnt a good idea, as there is a strategy to creating a deck, just as there is a strategy to playing the card game, and even the Pokmon video games themselves
Goblins has a pretty high ceiling on its nut draws, but it can also get some embarrassing draws when it doesnt come together
Unlike the prior standard set, Genetic Apex, which consisted of three different booster packs to choose from (that all contained their own unique cards, for the most part), Mythical Island consists of just one booster pack
But particularly in-demand sets often see booster boxes rocket into the hundreds or even thousands of dollars, as stock becomes more scarce
Also, maybe your currency isn't dollars