What Is COMC (Check Out My Cards)?

COMC is a mail-in marketplace: you ship cards to COMC, they scan the front and back, store the physical card in their warehouse, and list it for sale using that scan. Buyers shop COMC's combined inventory the way they'd shop any storefront, and when a card sells COMC pays the seller and ships (or keeps storing) the card for the buyer. The card itself doesn't move again until someone requests a shipment, which is the part that makes COMC different from a normal peer-to-peer listing site.

• You mail your cards in— sellers ship cards to COMC's processing center, generally as raw cards, using tracked and insured shipping since the cards are out of your hands for the whole trip.
• Processing turns cards into listings— each card is scanned front and back, identified, and priced with COMC's pricing tools before going live in the marketplace. Processing runs on a queue, and COMC offers paid rush tiers if you want cards listed faster than the standard free queue.
• The card stays in COMC's vault— unlike a consignment model where the marketplace ships each sale back out individually, a card that sells on COMC often just changes ownership in COMC's system while staying in the same warehouse, ready for the new owner to resell or request shipped.

COMC charges processing fees per card submitted (with lower or free tiers for slower processing and paid tiers for faster turnaround) and takes a percentage-based commission when a card actually sells, similar in principle to any consignment marketplace. Cards that sit unsold for a long time can also accrue ongoing storage or inventory fees. Rates and thresholds change over time, so confirm current numbers directly on COMC's site before shipping cards in.

1. Buy from the shared inventory— every card in COMC's marketplace is available to any buyer at once, priced by whichever member currently owns it, rather than one seller's individual storefront.
2. No shipping per card— a purchase just moves the card into your COMC account; it keeps sitting in the warehouse until you request a shipment, so buyers can keep adding cards to a virtual collection without paying postage on every single purchase.
3. Consolidated “mail day”— when you're ready, you request everything you own shipped together in one package instead of one envelope per card, which is the main cost saving COMC offers over item-by-item marketplaces for buyers who accumulate cards over time.
4. Grading from inventory— COMC has offered direct submission paths to send cards sitting in your COMC account out for professional grading without having them shipped to you first, similar in spirit to submitting cards for grading the normal way, just skipping a shipping leg.

• vs. eBay— eBay is peer-to-peer: each seller runs their own listings, sets their own shipping, and ships the physical card to each buyer directly. COMC pools everyone's cards into one warehouse and one marketplace, so the seller never handles outbound shipping on an individual sale.
• vs. Whatnot — Whatnot sales happen live, in real time, on camera; COMC is entirely asynchronous browse-and-buy with no live component at all.
• vs. traditional consignment— a consignment shop or marketplace typically ships a sold card out to the buyer right away and pays the consignor. COMC instead keeps sold cards warehoused indefinitely under the new owner's account unless that owner requests shipment, which is a meaningfully different model from how consignment normally works.

Confirm the exact card with Identify & Research — free-path first (on-device OCR, catalog match, and fingerprints). For how a marketplace ships your cards back out immediately instead of warehousing them, see How Sports Card Consignment Works, for a livestream alternative to a browse-and-buy marketplace see What Is Whatnot?, for a general marketplace without card-specialist warehousing see What Is Mercari?, and for the full range of ways to turn cards into cash see How to Sell Sports Cards Online.