Again, this doesn't matter so much over the long term because the supply of these decks will be massive, so things will even out, but for the short term, having $30 more in value is a reason to take Stalwart Unity, Breeding Lethality, or Invent Superiority over the other two decks
In my TCGplayer Infinite article, 7 Crazy Valuable Foil MTG Cards You Probably Own, I highlight a handful of Common and Uncommon foils with considerable value
In Commander games this could be something as innocuous as a utility spell, card draw, or mana acceleration
While supply and rarity definitely carry significant weight when determining a cards price, demand needs to also be there
They could also, perhaps, take these new moves to their regular Lorcana games
Most of what is in this article should apply abroad, but some of the websites I mention wont necessarily be the best choice in other regions