This directory lists the major online auction platforms specializing in trading cards, including sports cards, Pokémon, and other TCG collectibles. Each entry includes platform details, regional availability, and the types of cards most commonly sold. Data is sourced through direct research of each platform’s website and public listings. Closing methods vary by platform and are documented where confirmed. This page is updated periodically as new platforms emerge or existing ones change their formats. Use the filters to narrow by card category or platform type.