Pricing card by card does not scale and produces inconsistent results your regulars will notice.
Have a policy, not opinions
Set a percentage of market that you buy at, and a percentage you sell at, then apply it consistently and vary it only for stated reasons.
- Buylist percentage — typically 50–70% of market for singles, lower for bulk, higher for cards you know move fast.
- Sell percentage — at or near market for desirable cards; above market is defensible only for cards that are genuinely hard to find locally.
- Floors. Below a certain value, individual pricing costs more in labour than the card is worth. Bulk it.
Vary it for reasons you can say out loud
- Faster-moving games and sets justify a higher buy percentage.
- Cards you already have deep stock of justify a lower one.
- Condition below Near Mint should step the price down predictably, not arbitrarily.
What kills margin quietly
- 1.Stale prices. Buying at last month's market on a falling card.
- 2.Over-grading on intake. Paying Near Mint money for Lightly Played stock.
- 3.Untracked bulk. Bulk that is never counted is bulk that walks out of the shop.
How this is handled here
You set a default buylist percentage and a serialize value floor once, in settings, and the buy price is calculated for you against live market data on every card — with per-card overrides when you want them. Premium singles above your floor are tracked individually with a QR label; bulk below it is not, which is the right trade-off for both. The vendor guide covers the settings, and pricing covers what the platform itself costs.