Do you truly need 2022 pricing? Unless you are selling at auction, the 2018, 2019, or 2020 editions are almost identical for 95% of common stamps. Older catalogs flood the used market when a new edition is released.
Focus your energy on legitimate, low-cost access points: libraries, online subscriptions, and used book dealers. Your stamp collection—and your computer’s health—will be much better off for it. Happy collecting!
Population and sampling
