Magento vs TCGPlayer / Card Kingdom / Cardmarket, when does own-storefront win?

Honest cut, TCG-retailer specific:

Stick with TCGPlayer / Card Kingdom / Cardmarket marketplace if: singles catalog under 2,000 SKUs, single-game LGS, no hype-drop schedule, fine with their fee (TCGPlayer takes 10.25% + payment processing; Card Kingdom buylist-first), comfortable with their UX and zero brand control. Below ~$500k GMV the marketplace fees are usually cheaper than running your own platform.

Build your own Magento storefront if: singles above 10,000 SKUs, multi-game retailer (Pokemon + MTG + Yu-Gi-Oh + sports), hype-drop calendar (Charizard PSA 10, sealed Booster Boxes), graded collectibles with cert ID workflow, tournament prize-payout requirements, or you’ve hit $1M+ GMV and the marketplace cut is eating $100k+/yr.

The 2026 pattern most $2M+ TCG retailers run is hybrid: Magento as the order-of-record + brand storefront, TCGPlayer as a secondary sales channel for singles, eBay + Whatnot for graded auction-style listings. Magento syncs inventory out to all three via channel-manager or direct API. Cardmarket is the EU equivalent (DE/FR/ES/IT/UK) and matters if your EU share is >15%.