Retail Stores
Sport Card Shops – Independent sport card shops that specialize only in trading cards of all sports are a great option. They will have the largest selection of both modern and vintage baseball cards from every year available. Shop owners are also very knowledgeable about the hobby.
Big Box Stores – Larger retail chains like Target, Walmart, and Meijer usually have a trading card aisle where they sell packs, boxes and sometimes loose cards from the current season. Selection is more limited compared to sport card shops.
Hobby Stores – General hobby and game stores often carry a good supply of newly released baseball card products. Many also sell older loose cards and sometimes host trading card tournaments and events.
Online Marketplaces
eBay – Undoubtedly the largest online marketplace for buying and selling individual baseball cards. Just about any card from over a century of the game can be found on eBay. Condition and price can vary greatly so research is important. Authenticating cards purchased here can also sometimes be an issue.
Online Card Shops – Dedicated sport card website retailers like Steel City Collectibles, DaCardWorld and Blowout Cards sell new sealed products and also have huge inventory of single cards available in organized online catalogues. Reputable graders also list cards for auction on their websites.
Trading Card Platforms – Sites like COMC (Cardboard Connection) and services on TradingCardDB allow sellers to list cards in their personal collections. Searching and buying direct from individual collectors is very convenient.
Card Shows & Conventions
Local Card Shows – Held frequently all around the country, usually on weekends, these gather dozens of hobby vendor tables under one roof to browse and purchase from. Excellent for finding exclusive, rare and vintage singles and team sets.
National Conventions – Larger, annual multi-day extravaganzas hosted by the major card companies. Huge selection of sealed product, autograph sessions, memorabilia and thousands of vendor tables at events like National Sports Collectors Convention and Chicago Sports Collectors Convention.
Secondary Platforms
Online Classifieds – Sites such as Craigslist and Facebook Marketplace are worth checking for locals selling single cards or collection from their personal collection. Meetups require more discretion.
Online Auction Sites – platforms like eBay again but also others like Heritage Auctions specialize in auctioning rare, valuable baseball memorabilia, autographs and vintage singles. Require research, authenticating and usually an expensive price tag.
While retail stores provide new sealed product options, dedicated sport card shops, websites and shows offer the largest variety of both modern and vintage baseball cards from multiple sources. Online marketplaces remove geographical limitations but require research to avoid scams. Local card shows provide an interactive browsing experience along with exclusive listings not often found elsewhere. With so many avenues to choose from, any collector can surely find ways to grow their baseball card collection.