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Grading Basics

Start here if you want the fastest path to “good enough” grading estimates. Learn the scale, the terminology, and the key levers that move a note’s grade.

Paper Money Grading Scale Basics

4 min read • Updated Feb 2026

A beginner-friendly mental model for the 0–70 scale and what actually moves the number.

Authentication Basics: What to Check First

6 min read • Coming soon

A simple checklist to reduce the chance you miss an obvious red flag before you buy.