Local Card Shops – Small independently owned businesses that focus specifically on trading cards including sports cards, baseball cards, non-sports cards, and collectibles. They buy collections, have supplies, and facilitate trades between customers. Most have certain buylist prices for popular cards in standard condition. They also sell individual cards, boxes of packs, supplies, and magazines/books. Hours tend to be evenings and weekends to accommodate work/school schedules.

Online Auction Houses – Websites like eBay, Amazon Marketplace, and Heritage Auctions are good options to reach a large national/international buyer base. You can set minimum bids and timeframes. Just beware of fees for listing, final value, payments, and shipping. Description photos are important. Carefully check seller histories. This is best for higher value singles, sets, or full collections.

Local Consignment/Collectible Shops – General collectible stores that take a wider range of items might have a baseball card section too. They can sell your cards for a percentage commission of the final sale price, often 25-40%. Scope out what they do/do not accept first. Quality items tend to sell best. Be picky where cards are displayed/stored.

Local Sport Card Shows – Periodic weekend events held in large public spaces where dozens of vendors set up tables to buy, sell, and trade cards. Great for moving larger collections and seeing what unopened boxes and high-dollar singles are valued at currently. Most occur in warmer months. Some run dealer directories year-round too.

Mobile Card Buyers – Independent buyers who travel certain regions, making scheduled stops at local shops, shows, or special events. They generally buy collections for cash or store credit upfront. Research prices paid and trustworthiness first. Some operate via websites too for shipping larger lots.

Card Database Marketplaces – Websites like COMC.com and Beckett Marketplace provide a centralized portal for sellers to consign cards at set commission rates. Photos and descriptions are digitized for consistent, searchable inventory. Cards are securely stored until sold to verified buyers nationwide. Payments are handled automatically. Great option for vintage, rare, and high-value items with authentication/gradation services too.

Sports Memorabilia Auctions – Sites such as Heritage Auctions run big annual auctions of all kinds of historic game-used items, autographs, rare cards, full sets, and collections. Physical locations host preview/bidding events too. Auction estimates provide intelligent consignment. International buyer pool attracts very high prices, but commission rates are also highest at 20-30%.

Local Card/Collectible Forums – Regional Facebook groups and internet message boards let you advertise what you have for sale/trade. Potential buyers reach out to discuss serious offers. Great for singles, commons/uncommons, and smaller dollar value lots. Watch for scams but can yield local collectors.

Card Shows – Major nationwide annual multi-day conventions held in large convention centers in main cities each year. Events feature hundreds of dealer tables, memorabilia displays, autograph signings, giveaways and more. Also acts as a large card/collectibles marketplace. Great exposure but competitive sellers environment.

Sports Card/Memorabilia Websites – Other sites like Blowoutcards.com, SteelCityCollectibles.com, and SportsCardForum.com serve as both online card/memorabilia marketplaces as well as educational communities. Posts can reach interested collectors worldwide, especially for high-value vintage rarities. Payment methods vary.

The choice really depends on the size/scope of the collection, value, condition of items, and intended timeline. Local shops and shows provide fastest turnover for commons/uncommons. Online marketplaces reach the broadest sale pool. Show circuits or auctions cater to highest dollar cards/collections but take more time/effort. Researching the right avenue ensures cards end up in hands of true collectors who appreciate them most. Proper authentication, pricing, description, and paperwork are important throughout.