base set booster box price XY – dondiegotrading featuring Generation I Pokémon Pokemon Trading Card Game: XY

But the Neo era sets introduced Shining cards, which represented Shiny versions of Pokmon for the first time in the TCG (Shiny Pokmon feature alternate colorations and were also introduced in Generation Two, Gold and Silver , of the mainline Pokmon games)

However, if you're keen to add the set to your collection, I'd recommend keeping a keen eye out

And yes, they are paying more than 300k usd for a non graded/authenticated raw card

This also makes it much better for decks that play larger amounts of creatures with lesser power since it will allow your creatures to trade more readily with opposing attackers and blockers