When you pull a card from a GameStop Power Pack, it comes with a PSA grade — a number from 1 to 10 that tells you exactly what condition that card is in. But what does that number actually mean? And why does a single grade point sometimes double the price of a card?
What Is PSA?
PSA (Professional Sports Authenticator) is the world's largest and most trusted third-party grading service for trading cards. Founded in 1991, PSA has graded over 65 million cards. When a card is "PSA graded," it means a professional expert has physically examined the card, assessed its condition across multiple criteria, assigned a numeric grade, and sealed it in a tamper-evident protective case (called a "slab").
PSA grading serves two purposes: authentication (confirming the card is genuine) and condition assessment (telling you exactly how close to perfect it is).
What Does PSA Look At?
PSA evaluates four criteria when grading a card:
- Centering — Is the image properly centred on the card? PSA measures the border width on all four sides. Front centering tolerance for a PSA 10 is 55/45 or better; back centering tolerance is 75/25.
- Corners — Are the corners sharp and clean? Rounding, fraying, or whitening at the corners reduces the grade.
- Edges — Are the edges smooth and clean? Chipping, rough cuts, or visible wear along the edges impacts the grade.
- Surface — Is the surface free of scratches, print lines, stains, or other imperfections? This includes both the front image and the card back.
Each of these four areas is assessed, and the overall grade reflects the card's weakest attribute — one soft corner can bring a PSA 10 candidate down to a PSA 9.
The Full PSA Scale: 1 to 10
A virtually perfect card. Four sharp corners, sharp focus, full original gloss, and centering within 55/45 front and 75/25 back. This is the holy grail. PSA 10s command the highest premiums — the premium varies widely: modern cards typically fetch 1.5–2x a PSA 9, while vintage and rare cards can command 5x, 10x or more.
Superb condition with only one minor flaw — a very slight wax stain on the reverse, a minor printing imperfection, or slightly off-white borders. To the untrained eye, a PSA 9 looks perfect. Still a premium collectible grade.
Appears Mint at first glance but has a slight imperfection upon closer inspection — minor corner fraying, a slight printing defect, or minor surface wear. A PSA 8 is still a high-quality collectible and holds solid market value.
A card with just a slight surface wear noticeable upon close inspection. May have slight corner fraying or a minor printing defect. Still presentable and collectible, but the imperfections are visible when you look closely.
Visible surface wear or a printing defect that doesn't detract from the card's overall appeal. May have slight notching on edges or minor corner wear. Collectible, but the flaws are noticeable.
Very minor rounding of corners becomes evident. Surface wear and printing defects are more visible. Still a reasonable card for display, but clearly shows signs of handling.
Noticeable rounding on corners, surface wear is clearly visible, edges may show wear. The card has been handled but hasn't been abused.
Some rounding of corners, moderate surface wear, possible light scuffing or scratches. Centering may be significantly off. Still identifiable and complete, but clearly shows wear.
Noticeable defects — rounded corners, surface wear, possible staining or discolouration. The card shows significant handling and wear. Mainly collected for completeness or sentimental value.
The lowest grade PSA assigns. The card shows heavy wear, major defects, and significant damage. Still authenticated as genuine, but in poor overall condition. Extremely rare to see PSA 1s collected unless the card itself is exceptionally rare.
Why One Grade Point Matters So Much
In the graded card market, the jump between grades is not linear. The difference in value between a PSA 9 and a PSA 10 is often far greater than the difference between a PSA 7 and a PSA 9. Here's why:
- Population scarcity. PSA 10s are rare. For most cards, the ratio of PSA 9s to PSA 10s is heavily skewed — there might be 10,000 PSA 9s and only 500 PSA 10s of the same card. Scarcity drives value.
- Collector psychology. Collectors pursue perfection. "Gem Mint" has a prestige that "Mint" doesn't, even though the physical difference is often invisible to the naked eye.
- Registry competition. PSA runs set registries where collectors compete to have the highest-graded complete set. This drives demand for PSA 10s specifically.
Power Packs context: Every card from a GameStop Power Pack is a real, PSA-authenticated slab — graded and verified before you ever open the pack. A PSA 10 pull from a Power Pack is a genuine big hit, and the community goes wild when it happens on stream. Some real examples pulled on Roaring Sensei streams:
- 🌟 Poncho Pikachu PSA 10 — ~$12,000
- 🌟 Mew PSA 10 — ~$7,000
- 🌟 Pikachu #295/XY-P PSA 10 — ~$3,500
What About Half Grades and Qualifiers?
PSA occasionally uses qualifiers — notes like "OC" (off-centre), "MK" (marked), or "ST" (stain) — that indicate a card would have graded higher but for one specific flaw. These are less common in Power Packs since cards are curated for the platform, but they exist in the broader PSA ecosystem.
PSA does not use half grades (like 9.5). That's a distinction belonging to other grading companies like BGS (Beckett), which uses a 10-point scale with half-point increments.
Now You Understand the Scale
Every Power Pack reveal hits different when you know what the grade represents. A PSA 9 isn't just "good" — it's a specific, measured condition assessment. A PSA 10 isn't just "perfect" — the value premium over lower grades can be multiples higher, especially for vintage and rare cards.
Next up: You know what the grades mean. But where does your graded card actually live once you pull it? Here's how the PSA Vault works, and what sets our setup apart → How the PSA Vault Works