Cavport helps buyers understand the market context around a proposed purchase. Possible uses: understand observed price dispersion; compare like-for-like species and pack sizes; see market breadth; identify when a quote is being compared against the wrong pack size or channel; understand historical market context.
Cavport does not tell you whether you are "overpaying." Brand, service, scarcity, exclusivity and presentation may legitimately create different prices. Cavport describes the market; your decision remains yours.