Our prices have updated! CardCastle now uses TCGPlayer Market Price, who offer a more accurate and reliable card price data.
TCGPlayer's Market Price is based on the sales history of a specific card and draws on thousands of transactions to build that price. You can learn more about it and how the prices work here.
We gather the TCGPlayer Market Price from a third party, so there may be some delays on price spikes. If there are any cards that don't have a price listed, please contact either Frank or Seb in the Intercom app and we will resolve that as fast as possible.