Oldpostcards.com is an online store specializing in vintage and collectible postcards, offering enthusiasts and collectors a way to explore historical subjects and add distinctive pieces to their collections. Its extensive catalogue spans postcards from all 50 U.S. states and countries around the world, alongside themed collections covering holidays, ships, railroads, transportation, military history, sports, entertainment, occupations, and notable people. Shoppers can also browse artist-signed cards, real-photo postcards, Victorian trade cards, and other collectible categories, with selections that include rare finds, newly listed items, and clearance offerings.

The store provides information about postcard grading and shipping, and customers can contact the team with questions or category requests. Purchases can be made into greeting cards through an option at checkout. Additional services and resources include gift certificates, a mailing list, customer feedback, a glossary, and information about postcard history. Oldpostcards.com also shares details about its story and appearances at shows. The business lists a U.S. mailing address in Toccoa, Georgia, and provides phone and email contact options.