Guides for collectors

What building a valuation app taught us about card prices, written down so you can apply it without the app.

How to value a Pokémon card

Identify the card, spot the variant, read sold prices instead of listings — and scale for condition.

Judging card condition properly

Centring, corners, edges, surface — the four things PSA scores, and how to see them yourself.

Or let it do the work

What the guides walk through by hand, the app does in seconds — photograph a card, see the market value, weigh up grading.