A price should come with a source.
Useful references. Clear limits. Your collection deserves both.
A reference, with a source.
Cardmarket trends are shown in EUR and combine card languages and conditions. TCGplayer references are in USD for the English-language market. We keep these separate and show the provider’s update date.
The right copy matters.
A foil, stamp or reprint can change a card’s value. We use variant-level mappings where available. Ambiguous Cardmarket mappings are left unpriced. A graded or played card is not valued using an ungraded Near Mint reference.
Unknown is better than invented.
Your total includes available EUR references for ungraded Near Mint cards and any estimates you entered yourself. Missing prices and references older than seven days are excluded and counted. You can report a questionable price from the iOS card page.
History starts with an observation.
We record actual price observations and collection snapshots. A 7-day average is not a daily chart. Adding a card changes the size of your collection, so we do not automatically describe that as market growth.