Guides # Guides for card collectors Plain answers to the questions collectors ask before they grade, buy or sell: how the grading companies compare, what each grade means, how to spot wear and tell printings apart, and how to submit or sell cards. - [**PSA vs CGC**](https://cardinal-app.ai/guides/psa-vs-cgc/) PSA vs CGC (and BGS, SGC, TAG) compared: grading scales, subgrades, and what a 10 from each sells for, from prices across hundreds of valuable cards. - [**The PSA grading scale**](https://cardinal-app.ai/guides/psa-grading-scale/) What every PSA grade means, from Gem Mint 10 to Poor 1, plus half grades, qualifiers like OC and ST, and what usually keeps a card from a 10. - [**How to submit cards for grading**](https://cardinal-app.ai/guides/how-to-submit-cards-for-grading/) Step by step: choosing a grading company and service level, preparing and packing cards, shipping, tracking your order and what comes back. - [**BGS Black Label explained**](https://cardinal-app.ai/guides/bgs-black-label/) What a Beckett Black Label is, how it differs from a Gold Label Pristine 10 and a Gem Mint 9.5, what the subgrades need to be, and what the grades sell for. - [**CGC Pristine 10 vs Gem Mint 10**](https://cardinal-app.ai/guides/cgc-pristine-vs-gem-mint/) How CGC's two 10s differ — centering, corners, surface — what a 9.5 is, and how CGC grades sell compared with each other and with PSA. - [**1st Edition vs Unlimited**](https://cardinal-app.ai/guides/1st-edition-vs-unlimited/) How to spot a 1st Edition Pokémon or Yu-Gi-Oh! card, what Shadowless means, how Magic's Alpha, Beta and Unlimited differ, and how much more 1st Edition cards sell for. - [**TAG vs PSA**](https://cardinal-app.ai/guides/tag-vs-psa/) TAG's 1000-point score and defect report vs PSA's single grade: scales, what you get back, eligibility, and what a TAG 10 sells for next to a PSA 10. - [**Spotting whitening, print lines and wear**](https://cardinal-app.ai/guides/how-to-spot-whitening-and-print-lines/) Where to look and what to look for — corner and edge whitening, print lines, scratches and dents — and how each one shows up in a grade. - [**How to sell a card collection**](https://cardinal-app.ai/guides/how-to-sell-a-card-collection/) Value the collection first, separate the few cards worth real money, choose where to sell each part, and handle offers and scams. Also: [Is your card worth grading?](https://cardinal-app.ai/is-it-worth-grading/) · [What are my cards worth?](https://cardinal-app.ai/what-are-my-cards-worth/) · [How pre-grading works](https://cardinal-app.ai/pre-grading/) --- Get Cardinal, free: [App Store](https://apps.apple.com/app/cardinal-tcg-scan-grade/id6810442266) · [Google Play](https://play.google.com/store/apps/details?id=ai.cardinal.app)