Heres the smart approach: Stop handling it Oils from your fingers damage cards over time Sleeve it immediately A penny sleeve at minimum, ideally a toploader too Document the condition Take clear photos in good lighting Research the right selling platform eBay for rare cards, TCGPlayer for mid-range, local shops for quick cash Consider grading For cards worth $100+ raw, professional grading often increases value significantly Quick Summary Most cards arent worth much, but some are worth a lot Check rarity symbols first (stars and special symbols = potential value) Look up actual prices on TCGPlayer or Cardmarket Condition matters massively mint cards are worth much more Vintage holos and modern alternate arts are where the money is Use a scanner app to check collections quickly The Pokemon card market changes constantly

If you have Blast with Chain face down on the field, and activate it you may notice that sometimes it comes up with a screen that says place a monster in defense position, increase attack, or both effects
Jin-Gitaxias, Core Augur is perhaps the most brutal of these cards, giving you seven extra cards at the end of every one of your turns while simultaneously reducing each opponents maximum hand size to zero, barring they themselves do not possess a card like Reliquary Tower or Spellbook
Its not ugly but surely is a derp dragon