Transparency
Data corrections & change history
When a number on this site turns out to be wrong, it gets fixed and recorded here — date, what was wrong, and what changed. Automated collection also breaks sometimes; outages that affected published data are listed too. Entries below are drawn from the project's actual commit history. Found something wrong that isn't listed? Email gsa@whatsong.kr.
OutageThe daily eBay listings pipeline had been silently stopped for 3 days (a set with zero qualifying listings was mistakenly treated as a fatal error). Fixed, and the missed collection was re-run the same day. Listing-based figures dated 2026-08-24 to 2026-08-26 were delayed, not wrong.
CorrectionFour card-data errors corrected across the grading collectors, and TAG name validation was loosened where it had been wrongly rejecting valid matches (tracked TAG cards went from 185 to 196).
OutageThe market-data workflow file had a formatting error that stopped automated runs. Repaired, and a workflow audit was added so the same failure cannot pass unnoticed again.
CorrectionThree grading-population misattributions were found and corrected (cards credited to the wrong set or variant). An independent attribution audit now re-verifies every card against the grader's own label on each run.
CorrectionThe auction page was publishing the current day's still-open auctions as if they were final results. Now only completed days are published.
CorrectionThree CGC cards were missing from collection due to a blind spot in the collector. Backfilled.
CorrectionThe exchange rate used for currency conversion had been frozen for 47 days. Corrected, and the Monday grading collection that had stalled was restored.
CopyRemoved a causal overclaim from set panels: grading counts measure grading submissions, not box openings. The site no longer implies one proves the other.
PolicyAffiliate disclosure moved above the fold on every page with eBay links, following an eBay Partner Network compliance notice.
CorrectionPRB-01 Nami was showing OP-01's manga art instead of THE BEST's, and OP-09 Gol D. Roger carried a wrong card number (caught via a CGC population screenshot). Both fixed.
CorrectionA wrong date label appeared on every set's weekly grader-change figure. Fixed, and the underlying numbers were re-audited.
CorrectionFive card prices were wrong due to variant mix-ups in matching (a different printing's price was being picked up). Corrected, with new guards to block recurrence. Separately, CGC collection had been missing 9 of 43 list pages due to a pagination bug — backfilled.
CorrectionEmpty English-edition cells had been labeled "unreleased" even where the English printing exists. Blank now means "no data", never a claim about the product.
Routine daily data refreshes are not listed — only corrections, outages and policy changes. See methodology for how the data is collected.