PSA's "pop report" is free, public, and packed with clues about which cards are actually rare. Here's how to read it without falling for the traps that quietly cost collectors money.
What the pop report is
PSA is a company that grades trading cards. They seal each card in a hard plastic case and give it a score from 1 to 10, where a PSA 10 is "gem mint" — basically a flawless copy. The grade follows the card around for the rest of its life, and a higher grade usually means a higher price.
The population report, which everyone just calls the "pop report," is a running count of every card PSA has ever graded. Pull up any card and you can see exactly how many earned a 10, how many got a 9, and so on down the line. It lives at psacard.com/pop, it's completely free, and it updates almost every day as new batches finish grading.
Here's the one idea to hold onto: the pop report only counts cards that were actually graded. It tells you nothing about how many copies are for sale, how many collectors want the card, or how many raw — meaning ungraded — copies are still tucked away in someone's closet.
The two numbers that matter most
When you look up a card, two numbers do most of the heavy lifting:
- Total Graded — how many copies PSA has graded in all.
- PSA 10 count — how many of those copies earned a perfect 10.
On their own, though, these numbers can fool you. A PSA 10 count of 12 sounds impressively rare until you ask the obvious follow-up question: 12 out of how many? Twelve perfect copies out of 30 graded is ordinary, because that card grades easily, while 12 out of 2,000 is genuinely hard to find. Same number, opposite meaning — which is why you need one quick piece of math.
Gem rate: the number that really counts
The gem rate tells you how hard it is to pull a perfect 10 of a given card. PSA doesn't print it anywhere, so you figure it out yourself with a simple division:
PSA 10 count ÷ Total Graded × 100 = gem rate %
A card with 100 PSA 10s out of 2,000 graded has a 5% gem rate, meaning only 5 of every 100 graded copies reach a perfect 10. That's a hard card to grade, and hard cards tend to hold their value because the supply of 10s stays thin no matter how many people submit.
A card with a 60% gem rate is the exact opposite. Most copies come back as 10s, so perfect examples are everywhere and the price stays low. As a rough rule of thumb, a gem rate under about 10% means a 10 is genuinely scarce and worth paying attention to.
The biggest trap: "low pop = valuable"
This is the mistake that burns the most collectors. A card with only 2 PSA 10s in the entire world feels like buried treasure, and your gut tells you it has to be worth a fortune. Very often, it isn't.
Sometimes a card has a tiny count for a boring reason: almost nobody bothered to grade it. Picture a solid-but-not-famous player from a 1990s set that was printed by the millions. Only 2 copies got graded — not because the card is rare, but because maybe 40 people in the world actively collect that player, and the rest of us never thought it was worth the grading fee.
Now here's the second half of the trap. Because that card was printed in huge numbers, raw copies are everywhere and dirt cheap. The day one collector decides to grade 40 of them and a handful come back as 10s, your "rare pop 2" card suddenly becomes a "pop 20" card, and whatever premium you paid for evaporates. The lesson is simple: a small population only matters when real demand and real scarcity show up together.
When the pop report is trustworthy (and when it lies)
Pop numbers only mean something when there's a hard limit on how many copies can ever exist — in other words, a limited print run.
- Worth trusting: numbered parallels (cards stamped with something like /25 or /99, meaning only that many were made), vintage cards from before 1980, and special insert cards. Each of these has a real ceiling on how many can exist, so a low count actually means something.
- Be careful: modern "base" cards printed by the millions. A huge PSA 10 count there doesn't signal rarity — it just means a lot of people sent in copies of the same common card.
Some cards are also hard to grade by design. Shiny "refractor" cards — the ones with a rainbow coating — and dark-bordered cards show the slightest wear, so their gem rates stay low forever and those low rates are reliable. Old 1970s and 80s cards on thin paper grade hard too, but for a different reason: they're simply beat up from decades of handling. That difference matters, because a freshly opened sealed box from that era can suddenly flood the market with new 10s, while a refractor's difficulty never goes away.
One more thing the report can't show you: speed
A gem rate is a snapshot, not a permanent fact, and it shifts every single time new cards get graded. The number you calculate today is only as good as how stable the population is underneath it.
If a card is being graded quickly — say its total jumped from 800 to 12,000 in a single year — the gem rate you worked out today could look very different a few months from now. Collectors who bought raw copies expecting a rare 10 sometimes watch the value sink before their cards even come back from PSA.
So before you commit any money, check the total graded again a couple of weeks later. If it's climbing fast, wait and see where it settles. If it's barely moving, your number is reliable and you can trust it.
A simple buying checklist
Before you buy a raw card hoping to grade it for profit, walk through these five questions:
- Is there real demand? Confirm the card is actually selling on eBay, not just listed.
- Is the gem rate low? Do the quick math — under about 10% means a perfect 10 is genuinely hard to pull.
- Is the population stable? Make sure the total graded isn't shooting up right now.
- Does the 10 sell for a lot more than the 9? Compare sold prices for both grades. A big gap means buyers are paying up for the scarce 10.
- Is the raw card cheap enough? Grading isn't free — it runs roughly $25 and up per card, and your copy might come back a 9 or lower. Leave yourself room for that.
If all five line up, the math is genuinely on your side. If even one of them fails, that's your cue to slow down and think it through.