Article
Sep 26, 2026
A card’s value comes down to seven details: which exact card it is, its rarity and variant, four condition areas, and what graded copies really sell for. Here’s how to check each one.
By the Gradeon Team · Updated
A trading card's value depends on seven details: the exact card (set and number), its rarity and variant, four condition areas (centering, corners, edges, surface) and what graded copies of that card actually sell for.
Get any one of them wrong and the price you find online belongs to a different card, or a different condition. This guide walks through the seven details in the order a careful collector checks them. It takes a few minutes per card, and it tells you whether a card deserves a closer look before you spend money on grading.
The set symbol and the collector number printed on the card identify it. A name alone is not enough: the same character is printed in many sets, and each print has its own price.
Read the number exactly as printed, then search for it together with the set name. If the artwork in the result does not match, you are looking at the wrong card. In Gradeon, card identification reads the name, set and collector number from your front photo and matches them to the catalogue. If the match is wrong, tap "Wrong card?" to correct it.
Rarity and variant set the price tier before condition is even considered. A holo, a reverse holo, a special stamp or an alternate-art print of the same card can sit in completely different price ranges.
Look at the rarity symbol, the foil pattern and any stamp or edition mark, and note the variant in one line. From then on, compare like with like: prices for a different variant tell you nothing about yours.
Centering measures how evenly the printed image sits inside the card. Gradeon writes it as two ratios, left/right and top/bottom, for example 52/48 | 49/51. A perfect card is 50/50 | 50/50.
Compare the left border with the right, and the top with the bottom. If the difference is obvious to the eye, a grader will see it too. In Gradeon's scale, a card within 2% of perfect scores 10 on centering, within 5% scores 9, and within 8% scores 8. Centering counts for 15% of each side's grade, and you confirm it yourself before a Full Grade is final.
Corners are where wear shows first. Sharp, square tips are what you want; whitening, softness, rounding and fraying cost points quickly.
Check all four corners on the front and the back under bright side light. A single dot of whitening on one corner is enough to hold a card at Mint, and softness on any corner caps corners at 8. Corners count for 25% of each side's grade.
Edges pick up whitening, chips, nicks and fraying from handling, sleeves and binders. On dark borders the damage is easy to see; on light or yellow borders it hides.
Run your eye along each edge on both sides, then tilt the card under light. On foil cards, look for silvering, where the silver foil layer shows through along the border. Edges count for 25% of each side's grade.
The surface is the largest area of the card and carries the biggest weight: 35% of each side's grade. Scratches, print lines, dents, creases, stains, scuffing and loss of gloss all live here.
Hold the card at an angle to a single soft light and rotate it slowly. Holo areas hide the most. Check the back for dents and creases as well: a crease caps surface at 6, which means a creased card tops out around 7 overall.
Sold prices, not asking prices, tell you what a card is really worth in each condition. Compare the price of raw copies with graded copies of the same set, number and variant, and write down the date you looked, because prices move.
The gap between the two is what decides whether grading could pay off. In Gradeon it is called the uplift: the difference between a card's raw value and the graded asking price at its estimated PSA tier, shown as "PSA 9 would be worth €X (+Y%)". Gradeon Pro adds eBay sold data, recent actual sales, for the best read of what a card changes hands for.
Gradeon scores each area separately on the front and on the back, then weights them: surface 35%, corners 25%, edges 25%, centering 15%. Each side is capped at its weakest area plus 1.0, and the card's grade is the average of both sides, capped at the weaker side plus 1.0. One weak area holds the whole card back, which is why a flawless front with one bad corner still misses the top grade. Card Grading, Explained walks through the full calculation with worked examples.
Scan the front of your card with Quick Price and Gradeon identifies it and shows its market price in a couple of seconds. When a card looks worth grading, run a Full Grade to see exactly where it stands.
Identify the exact card by set and collector number, confirm its rarity and variant, check centering, corners, edges and surface, then compare recent sold prices of raw and graded copies of the same card.
Yes. The same card can sell for very different prices depending on its grade, which is why the gap between raw value and graded price is the key number when deciding whether to submit.
Quick Price uses one photo of the front to identify the card and show its market price in a couple of seconds, without grading. A Full Grade uses the front, back and optional detail shots to produce sub-grades, a combined pre-grade and prices.
No. Gradeon is a pre-grading tool. It estimates condition and value before you submit, and its result is not a PSA, BGS or CGC grade.