Trading card grading guide for collectors
Learn what PSA, BGS, and CGC grades mean — and how condition affects the value of your trading cards.
The grading scale and what each tier means
Professional grading services use a numerical scale to express card condition in a way that buyers anywhere in the world can trust without holding the card in hand. PSA uses a 1–10 scale, with PSA 10 Gem Mint representing a card with perfect centering, four sharp corners, clean edges, and a flawless surface free of print lines, scratches, or staining. BGS (Beckett Grading Services) uses a similar scale but also issues sub-grades for centering, corners, edges, and surface, with a BGS 10 Black Label requiring all four sub-grades to hit 10. Raw, ungraded cards are described using informal terms like Near Mint, Lightly Played, and Heavily Played — a language useful for peer-to-peer sales but less trusted in high-stakes transactions.
How to assess condition before you scan
Grading starts before any app or professional service gets involved. Hold the card under a bright, raking light source and rotate it slowly to catch surface scratches, print lines, and wear that flat overhead light misses. Examine all four corners under a loupe or magnifier for whitening, which indicates the layers of the card stock have separated slightly from handling. Check the edges for nicks and chips. Finally, assess centering by comparing the border widths on all four sides — a card with noticeably unequal borders loses points immediately even if the surface is pristine. Honest self-assessment prevents surprises when professional grades come back lower than expected.
When grading makes financial sense — and when it doesn't
Grading fees vary by service tier and current turnaround times, ranging from around $20 for economy bulk submissions to over $300 for express handling of high-value cards. The math is straightforward: if a graded copy of your card in the expected grade sells for at least the raw price plus the grading fee, submission makes sense. High-value cards in excellent condition almost always benefit from grading because the certified condition removes doubt and widens the buyer pool. Mid-range cards become a judgment call — a $40 raw near-mint card that grades PSA 9 and sells for $80 clears the fee; one that grades PSA 7 and sells for $45 does not. FoilLens gives you a raw price reference to run those numbers before committing to submission.
FAQ
What is the difference between PSA, BGS, and CGC for trading cards?
All three are well-regarded professional grading services, but each has a different market reputation and community following. PSA grades are the most widely recognized in the sports card and Pokémon markets and often command higher secondary-market premiums for the same condition. BGS sub-grades appeal to collectors who want granular condition information. CGC, originally known for comics, has grown its trading card grading business rapidly and is now a trusted alternative. The best choice depends on which community your card is likely to be sold into.
How do print lines affect a card's grade?
Print lines are fine lines or streaks left on the card surface by the printing process. Under raking light they appear as faint parallel lines running across the card. They are a manufacturing defect, not caused by the owner's handling, but graders treat them the same as surface wear because they affect the card's appearance. A heavy pattern of print lines can drop a card from a potential PSA 10 to an 8 or lower. Checking for print lines before scanning or submitting helps set realistic grade expectations.
Does FoilLens adjust its price estimate based on condition?
Yes. When you scan a card, you can select a condition tier — from Gem Mint down to Heavily Played — and the reference price range updates to reflect that grade level. This lets you quickly model the price difference between submitting a card for professional grading versus selling it raw, helping you decide the more profitable route.