Nolan Ryan / Jerry Koosman — 1968 Topps Base #177 · PSA 9

Source-linked sales are public facts cited to the page that reports them. Relicmark has not authenticated any card, certificate, payment or settlement. The composite is an estimate, not an appraisal: method relicmark-composite/1 uses verified US-dollar sales of this exact card and grade from the last 18 months, weights each sale 10% less per completed month of age, takes the weighted median, excludes outliers and never converts other currencies. A price cited from a sales tracker is in US dollars as that site reports it, which can be the tracker’s own conversion of a sale made in another currency. Evidence counts: sales on file are every sale record attached to this ledger, including records later excluded; counted sales are the verified US-dollar sales from the last 18 months that feed the composite after outliers are removed; excluded records were found to be a different card or grade, a non-sale or a sale whose price could not be confirmed, and are kept for the record; pending sales await a source re-check; held sales come from a source whose written permission to reuse its records is not on file, so they are listed with their source link and never counted. Cert linked is Yes only when the source page shows the certificate number; most marketplace sources do not. Asking prices are listings, never sales. Listings are links added by sellers. Relicmark does not check them, and they never change the composite. The team shown is the one named for the card by its checklist or a cited page, not a current roster.