Where prices come from
Several venues, combined server-side into one quote, with the proof one tap away.
Zukan ingests the venues where cards actually sell: TCGplayer, Cardmarket, CardTrader, PriceCharting and others. Their figures are combined on our servers into one quote per printing, with outliers trimmed, and refreshed every night.
Every card sheet names the venues behind its number and the date each was read. Tapping the range opens the proof, including the quotes that were discarded and why. No figure on a sheet is ever typed by hand.
Zukan is not affiliated with any of these venues. A price is a market observation on a date, not an offer and not an appraisal.