Baseball card price guide: Price Guide Services

Every row is a verbatim sentence read from the named source's own page through our fetch service on the date shown, hash-pinned to the stored read (the sha of the page's visible text; the raw page is mirrored to R2).

3 of the 20 named sources that could be read published a usable figure; 17 published none and are recorded as not published, never filled in; 2 could not be read (blocked, dead or unreachable) and count nowhere.

The headline figures (median, minimum, maximum, quartiles) are over ONE figure per source in USD (a source's median where its page yielded several accepted sentences), so N counts sources, never sentences; 46 candidate sentence(s) were refused by a reviewer with the reason recorded.

The fuller derivation this dataset is chartered to grow into (not yet what the figures above are; they are each source's own published figure as read): one row per service: price per month and per year, what the free tier actually gives (scan count, collection cap, which sports), the sports and eras covered, whether the quoted value is a realised sale, an asking price or an editorial estimate, and whether an API or CSV exists at all.

The derivation is the median and full spread of subscription price across every service that publishes one, the count that are genuinely free, and the share whose 'value' is an asking price rather than a sale - which is what 'baseball card values free' is really asking and what no service will ever say about its competitors.

46 candidate sentences on these pages were refused by a reviewer; each refusal and its reason is recorded in the review ledger.