EverySlabHow fair value works
Fair value is our estimate of what a card, in one specific grade or condition, really sells for right now. It reflects completed sales, not what sellers hope to get.
Updated Oct 22, 2026
What is the fair value
Fair value is EverySlab's estimate of what one specific card version — one language, grader and grade, or one raw condition — typically sells for right now. It is built from completed sales, not from asking prices.
Data sources
Completed sales come from eBay, Fanatics Collect and Goldin; live asks come from public Cardmarket listings. Prices are converted to euros and compared without shipping.
How it is calculated
Each version is priced on its own slot, using a recency-weighted median of sales from the last 365 days.
- Older sales fade with a 90-day half-life instead of dropping off a cliff.
- Statistical outliers in log space are set aside when there are at least five sales.
- When a slot rarely sells, EverySlab walks to English, a neighbouring grade or PSA — at most two hops — using median price ratios from at least five other cards.
- Direct sales and that prior are blended; the more sales a slot has, the less it leans on neighbours. High confidence is reserved for a tight direct estimate.
How often it updates
Fair values recompute every day as part of EverySlab's daily market job. A sudden hype spike shows up within days, not instantly.
Grades and conditions covered
Graded slots cover PSA, BGS, CGC, TAG and ACE across the usual grade ladder. Raw slots use US-mapped conditions: mint, near mint, excellent, good, lightly played, played and poor. Special qualifier labels are not valued.
Limitations
Fair value is not a guaranteed sale price. It excludes shipping and marketplace fees, skips qualifier labels, and never puts low-confidence estimates in the deals feed. Deals also require an ask at least 15% under fair value, a fair value of at least €30, and no blocking flags such as a risky comment.
Questions
How is EverySlab's fair value calculated?
For each card, language, grader and grade (or raw condition), EverySlab takes completed sales from the last 365 days, down-weights older ones with a 90-day half-life, drops statistical outliers, and uses a recency-weighted median. Thin slots borrow from a neighbouring language, grade or PSA using market-wide ratios, then blend.
Where does the price data come from?
Fair values come from completed sales on eBay, Fanatics Collect and Goldin, converted to euros. Live asks and the deals list come from public Cardmarket listings. Shipping is excluded on both sides.
How often are prices updated?
Fair values recompute every day from the latest sales we have collected. A sudden spike shows up within days, not instantly.
Which grading companies are covered?
PSA, BGS, CGC, TAG and ACE, plus raw cards in US-mapped conditions from mint to poor. Special qualifier labels are not valued.
Is the fair value the price I will get when selling?
No. It is what that version has typically sold for recently. Your copy can sell higher or lower depending on centering, surface, how you list it and how fast you want it gone.
Does fair value include shipping or fees?
No. Fair value and asking prices both exclude shipping, so the comparison is like for like. Add shipping before you decide.
Why do some listings have no fair value?
Cards with special labels (qualifiers) or without enough related sales do not get a number. We would rather show nothing than a guess.
How does the deals list use fair value?
A listing becomes a deal when it is at least 15% under fair value, the fair value is at least €30, confidence is high or medium, the ask is in euros, and it has no blocking flags such as a risky comment.
See it in action
Today’s live listings that sit well under fair value.