Field-level guide for interpreting raw and graded pricing data across marketplaces.
near_mint - strongest raw premium baseline
lightly_played - minor wear, active liquidity
moderately_played - visible wear, broader spread
heavily_played / damaged - high variance, low ceiling
Graded pricing is grouped by grader (`psa`, `bgs`, `cgc`, etc.) and grade value (`10`, `9.5`, `9`). Compare spreads by grade, not only by card.