Collect with confidence.
Know a little more.

Practical guides, tools and community answers to help you understand your manga and collect with greater confidence.

Grading · Slabs and the market

BGS grading: what you need to know.

Read the label, explore the grades and learn to inspect the book before submitting it.

Grading · Alterations

Eight slabs, eight interventions to understand. Learn to read BGS notes and see how much they can matter to the price.

Authenticity · Tankōbon

38 photographs, zoomable comparisons and sources: inspect the details before buying.

Authenticity · Zasshi

40 first-appearance photographs, issue-specific checkpoints and official facsimiles explained.

The basics · Identification

Colophons, dates, obi and inserts: archive photographs to help identify the copy you are buying.

Grading · Practical guide

Find the POP, read the grades and understand “POP 1”. A video and One Piece example, with data and sources.

The basics · Formats

Books and magazines, sizes and editions: a practical guide to understanding your manga and choosing protective sleeves.