What apps do card resellers use?

Card resellers primarily use Cardmarket (largest in Europe, ~1M monthly users), TCGPlayer (dominant in North America for Magic/Pokemon), eBay for broader reach, and Shopify for independent stores. Many also use Discord servers and Reddit communities like r/PokemonTCG to buy/sell directly, avoiding marketplace fees. For inventory management, resellers track stock in spreadsheets or lightweight tools like Airtable, though some use specialized TCG software like Delver Lens for card scanning and pricing. Facebook Marketplace and local Facebook groups drive offline sales with no shipping costs. Most serious resellers combine 3-4 platforms: one main marketplace for traffic volume, a personal website for repeat customers, and social channels for community building and direct sales. Success depends on fast listing, competitive pricing (monitoring rival listings), and building trust through reviews. Shipping tools like Pirate Ship help reduce costs. There's no single app that dominates because arbitrage and scale require multi-channel presence.