It remains a top-tier example of how special event cards can carry deep historical and emotional value for the long term
Its not worth playing Crystal Quarry to fix for anything else, so its just not worth playing at all
Different platforms take a different cut of the profits (10% from TCGPlayer, 10-15% from eBay) and you'll find cards are more or less likely to sell on different marketplaces
There's always plenty of good artifact/enchantment targets to blow up in your typical Commander game, which means this card will reliably rack up plenty of savage X-for-1's should you choose to include it
To build a competitive deck, investigate the current meta for Pokemon TCG by consulting online forums, observing competitive matches, and conversing with knowledgeable players
But most aggro decks are built with the opposite philosophy