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Notes from building a card scanner

How recognition actually fails, where card prices come from, and what to ask of any app before you hand it a collection.

  1. Which Pokémon cards are worth money?

    Found an old binder or a box of cards? Most of it is worth little, and the few that matter carry marks you can spot in minutes — how to sort a stack before you check a single price.

  2. What to do with bulk Pokémon cards

    A box of commons, energy and duplicates is most of almost every collection. How to pull out the cards that are not bulk, sort the rest, and sell, trade, give away or keep it.

  3. How to choose a Pokémon card scanner

    Every Pokémon card scanner is free to install, and every one says it identifies a card instantly. That is not where they differ — five questions that find the ones that do.

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