To break even at this price, you'd need to hit a serialized card, but there are some really expensive ones you could pull - from a serialized One Ring worth up to $7,500, to a Last March of the Ents worth $4,000
The beauty of these apps is that since price varies between set and language for every card, it's usually super easy to switch between different versions of the card (whether set or language) This should make it relatively easy to find the english (or any other language it's been printed in) version of the card
Think of any of the 151 Kanto-region Pokmon, answer its questions out loud, and the light-and-sound ball uses voice recognition to guess who you're thinking of
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Heavenly Inferno You might not enjoy how rife the format became with cards like Kaalia of the Vast or Karador, Ghost Chieftain, but you cannot deny their power