Unlimited catalogue, unlimited tills
Every card you own, on one storefront, with as many tills running at once as you have staff on the floor. A second till at a weekend show is not a second subscription.

A flat monthly price and no percentage of what you sell. The card-shop software that does take a cut usually wants 2–2.5%, on top of a subscription and a Shopify plan underneath it.
Every card you own, on one storefront, with as many tills running at once as you have staff on the floor. A second till at a weekend show is not a second subscription.
A seller works the till and reads the catalogue. What you paid for a card lives in a separate table only owners and managers can read — enforced in the database, not by hiding a column.
Point your own address at your akard storefront, so the shop you have spent years being known as is the shop a buyer sees.
Thirty cards, the full till and a real storefront, with no card details and no clock.