Grading is not magic and it is not a price guarantee. It is a documented opinion by a third party. This guide explains what graders measure, why two graders can disagree, and when grading is worth the cost.

What grading actually measures

Across every category — cards, coins, comics, video games, action figures, autographs — graders measure four broad attributes:

• Condition. Wear, tears, surface damage, fading, soiling, cracks, scratches, restoration. The bulk of what most graders weigh.
• Authenticity. Is this what it claims to be? Some services bundle authentication into grading; others split them.
• Eye appeal. Subjective overall impression. Two cards with identical objective flaws can grade differently if one “presents” better.
• Pedigree (where relevant). Provenance from a famous collection or estate that affects the holder label.

The major services by category

• Cards: PSA (the volume leader, 1–10 scale), BGS (sub-grades for centring/corners/edges/surface), SGC (oversize black-label holder favoured for pre-war), CGC Cards (entered the TCG market aggressively).
• Coins: PCGS and NGC (both use the 1–70 Sheldon scale). ANACS for older slabs.
• Comics: CGC (industry standard, 0.5–10 scale), CBCS (founded by ex-CGC graders), PGX (less liquid in the secondary market).
• Autographs: JSA (James Spence), PSA/DNA, Beckett Authentication.
• Sealed video games: WATA (box-grade out of 10, seal-rating A++ to C), VGA.
• Action figures and toys: AFA (Action Figure Authority).

Why two graders can disagree

Grading is opinion-based pattern recognition. Two qualified graders looking at the same item will agree most of the time on rough condition tier and disagree at the boundaries. A card that one grader sees as a 9 with sharp corners but slightly soft centring, another may grade as a 9.5. Neither is wrong; they are weighing the attributes differently. This is why crossover submissions exist — collectors hoping that a different service’s weighting yields a better label.

When grading is worth it

Grading is worth it when:

• The graded value of the item is at least 3-5x the grading cost. (Otherwise the maths breaks.)
• The item is liquid in graded form. (Some niche categories trade better raw.)
• You intend to sell, not to keep forever. (Insurance and storage benefits don’t always justify the fee for personal collections.)
• You have a reasonable confidence in the grade you’ll receive. (Grading at the wrong tier loses money.)

Population reports and Pop 1s

Every major service publishes a population report — a running count of how many examples of each issue have been graded at each level. A “Pop 1” is the only known example at that grade, with no examples graded higher. Pop 1 status often produces dramatic price premiums but is fragile: another collector can submit a higher-grade copy at any time. Always check the population report on the day you transact, not on the day you decide to transact.

Reholders, regrades, and crossovers

A reholder swaps an old holder for a new one without re-grading. A regrade opens the item and re-evaluates from scratch — risky if you have the high end of a grade. A crossover sends a graded item to a different service for a fresh label. Each has costs, risks, and use cases; never make these decisions casually.

What grading does not protect against

Grading does not protect against: market shifts, changing collector preferences, holder degradation, the service itself going out of business, or fraud where a real holder is reused around a fake item. Treat the slab as one piece of documentation, not the whole story.

What to read next

Pair this guide with Authentication 101 and Pricing & Market Watch 2026.

Frequently Asked Questions