The single overall grade BrickDb derives from a copy's condition profile, from Sealed down to For parts.
The condition grade sums up a condition profile in one word. Every aspect of the profile sets a ceiling, and the lowest ceiling wins. The ladder runs: Ready to ship box (sealed), Ready to ship box (opened), Sealed, Mint, Near mint, Excellent, Very good, Good, Fair, Poor, For parts. Valuations are computed per grade.