COMC (Check Out My Cards), founded in 2005, is a leading online marketplace and consignment platform that enables collectors to submit cards in bulk - COMC scans, stores, lists, and fulfills orders on their behalf.

Its system automatically cross-lists fixed-price items on eBay and gives sellers one-click access to multiple auction formats--including eBay Live--so they can reach diverse buyer audiences with ease. In 2025, COMC surpassed 40 million active listings, underscoring its unmatched inventory depth.

With its scale, automation, and trusted consignment process, COMC remains a go-to destination for collectors seeking convenience, reach, and liquidity in the card market.