Is PSA 10 always worth more than PSA 9?

Yes, almost without exception. The PSA 10 to PSA 9 multiplier ranges from about 2x for common modern cards to 50x or more for vintage and key rookies. Browse our category pages to see the actual gap for any given card.

What is the difference between PSA, BGS, and SGC?

All three are independent third-party graders. PSA has the largest market share and tends to command the highest resale premiums. BGS uses subgrades for centering, corners, edges, and surface. SGC is favored for vintage cardboard. eBay sold-price comparisons usually show PSA cards trading at a 10-25% premium over equivalently-graded BGS or SGC.

Should I crack a PSA 9 to try for a PSA 10?

Almost never. Crossover and crack-and-resubmit attempts succeed at single-digit percentages on cards that have already been graded once. The expected value is negative for any card where the PSA 10 to PSA 9 ratio is below roughly 12x.

How to Read PSA Grades for Trading Cards

PSA (Professional Sports Authenticator) is the most influential third-party grading service in the trading card hobby. A PSA grade is a single number from 1 to 10 stamped on a tamper-evident slab, and it is the single biggest determinant of a card's resale value after the card itself.

This guide explains exactly what each PSA grade means, how the grade was assigned, and — most importantly for collectors and investors — how the price of the same card moves as the grade moves. All examples in this guide use real sold-price data pulled live from eBay completed listings.

The PSA Grading Scale

PSA grades cards on a 10-point scale. Half-grades (PSA 9.5, PSA 8.5, etc.) exist but are rare and not part of the standard tier system most collectors use when shopping.

PSA 10 — Gem Mint. Four sharp corners. Sharp focus and full original gloss. No staining of any kind. No print spots, lines, or scratches. Centering must be approximately 55/45 to 60/40 or better on the front. PSA 10 is intended to denote a card that is "virtually perfect."
PSA 9 — Mint. Allows for one minor printing or focus imperfection, or one minor wax stain on the back, or slight off-whiteness on the borders. Centering of approximately 60/40 to 65/35 on the front.
PSA 8 — Near Mint-Mint. Allows for slight fraying at one or two corners, very slight notching, and slight wax staining. Centering 65/35 to 70/30.
PSA 7 — Near Mint. Permits a few light surface scratches, fraying corners, and minor centering issues.
PSA 6 — Excellent-Mint. Cards in this grade may exhibit minor rounding of corners and minor wax staining.
PSA 5 — Excellent. Visible surface wear or printing defects may be present. Centering may extend to 80/20.
PSA 4 — Very Good-Excellent. Light scuffing or scratching is permitted on the surface. Corners may show some rounding.
PSA 3 — Very Good. Significant rounding of corners is acceptable. Light creases may be visible.
PSA 2 — Good. Substantial creases, surface marks, or color loss are present but the card retains its overall integrity.
PSA 1 — Poor. Major creases, tears, writing, or other significant damage. The card is identifiable and intact but heavily damaged.

How Grade Drives Price

The relationship between PSA grade and resale price is non-linear. The jump from PSA 8 to PSA 9 is usually meaningful but rarely dramatic. The jump from PSA 9 to PSA 10 is almost always a multiple, not a percentage. For modern cards, a PSA 10 typically trades at 2x to 4x the PSA 9 price. For vintage cards from the 1950s and 1960s, the multiplier can stretch to 20x, 50x, or — in extreme cases involving Hall of Fame rookies — into the hundreds.

The reason is supply. PSA 10 grading is hard to achieve, and PSA tracks the population of every card ever graded. When the PSA 10 population for a given card is below a few hundred copies, the scarcity premium compounds with collector demand and the price separates sharply from the PSA 9. For modern releases where the PSA 10 population may be in the tens of thousands, the gap is narrower because supply is plentiful at the top tier.

Reading the PSA Label

Every PSA slab has a label across the top with the grade printed in red on the right. The label also lists the player name, the card year, the set name, the card number, and a unique certification number. The certification number is the most important field for buyers: you can type it into PSA's public certification verification tool to confirm the card is real and the slab has not been tampered with. Anyone selling a high-value PSA card who refuses to share the cert number should be treated with suspicion.

Beyond the basic label, PSA also stamps qualifiers in some cases. The most common qualifiers are OC (off-center), MC (miscut), MK (marks), ST (staining), and PD (print defect). A graded card with a qualifier is graded on every other criterion as if the qualifier did not exist, but the qualifier is a permanent flag that significantly reduces resale value. A PSA 9 OC will typically sell for substantially less than an unqualified PSA 8 of the same card.

PSA 10 vs PSA 9: The Real Gap

The single most actionable piece of knowledge in PSA pricing is the PSA 10 to PSA 9 ratio for the specific card you are buying or selling. Our category pages show this gap automatically. A few representative examples:

Modern stars (active players, recent rookies). The ratio is typically 2x to 4x. Population reports run into the tens of thousands and PSA 10 supply is plentiful relative to demand. This is the band where flipping recent slabs is hardest because the spread is small.
Modern key rookies (Trout, Brady, LeBron). The ratio expands to 5x to 12x as collector demand outpaces population growth. Iconic rookies in PSA 10 hold their value remarkably well and historically have outpaced the broader sports card index.
Vintage Hall of Famers. The ratio jumps to 15x, 30x, or even 100x. A 1952 Topps Mickey Mantle PSA 9 sells in the high six figures; the few PSA 10 copies in existence trade in the low eight figures.

Always look up your specific card before assuming a generic ratio. A card that looks similar to another card in the same set can have a wildly different gap depending on print run, eye appeal across the population, and historical demand.

Why Crack-and-Resubmit Almost Never Pays

New collectors frequently see a PSA 9 with a healthy gap to PSA 10 and assume that cracking the slab and resubmitting is a quick path to profit. In practice, the math is brutal. PSA itself upgrades only a small fraction of resubmissions to a higher grade, and the cards that get upgraded were already on the bubble between two grades. A PSA 9 that grades a hard 9 will not magically become a PSA 10 the second time. Submission fees, return shipping, and the very real risk of a downgrade or a damaged card during cracking erase the expected value on almost any modern card.

Buying Smart with Sold-Price Data

The most important habit for any PSA buyer is checking actual sold prices, not asking prices. Listing prices on eBay are aspirational; sold prices are reality. Our category pages aggregate every PSA-graded sale in our database for a given card and tier so you can see at a glance whether the slab in front of you is fairly priced, overpriced, or a deal. We update the pages daily.

If you are about to buy a graded card, follow this checklist: (1) check the PSA cert number against PSA's online verification tool, (2) compare the asking price to the median sold price on the relevant tier page on this site, (3) look at the PSA 10/PSA 9 ratio to understand whether the price gap is normal for that card, and (4) confirm that recent sales are trending in the same direction as the asking price rather than below it.

Where to Go Next

The links below will take you to live sold-price pages for the most-shopped graded cards on this site. Each page shows median, average, and recent sale prices for the exact tier — PSA 10, PSA 9, PSA 8, raw, and so on — drawn live from completed eBay transactions.