Perfect. Overall look is as if it had never been handled or released for sale. Nearly imperceptible bindery defects or printing flaws may be seen under extremely close inspection. Corners are sharp and square, cover inks are bright and reflective, spine is tight and flat, staples are centered, pages are white and supple. No cover soiling, creasing, tearing, pieces missing, or wear.

Nearly perfect. Overall look is as if it had just been hand-selected as the best copy from the newstand and never read. Only subtle bindery or printing flaws allowed. Corners are sharp and square, cover inks are bright and reflective, spine is tight and flat, staples are centered, pages are white and supple. No cover soiling, creasing, tearing, pieces missing, or wear.

Nearly perfect with only minor imperfections. Overall look is as if it had just been purchased from the newstand and carefully read once or twice. Subtle bindery or printing flaws allowed, including a 1/16" bindery tear. Corners are sharp and either square or with ever-so-slight blunting, cover inks are bright and reflective, spine is tight and flat, staples are generally centered, pages are off-white to cream and supple. No cover soiling, creasing, tearing, pieces missing, or wear.

Outstanding with excellent eye appeal. Overall look is as if it had been read a few times and carefully handled. Limited number of bindery or printing flaws allowed. Corners may have minute wear, cover inks are bright and moderate to highly reflective, spine is almost completely flat with a possible minor color break, staples may have slight discoloration, pages are cream to tan and supple. No obvious cover soiling, tearing, or pieces missing. Cover may have minimal surface wear with a possible 1/4" or smaller bend that doesn't break color.

Above-average copy that shows minor wear but is flat and clean with good eye appeal. Overall look is as if read a few times and handled with moderate care. Some accumulaton of bindery or printing flaws allowed. Corners may have blunting, cover inks may be less bright or have reduced reflectivity, spine may have a minor roll with a possible 1/4" split or color break, staples may have minor discoloration, and pages are tannish and fairly supple. Minor cover soiling and staple tears allowed. No pieces missing. Cover may have minor surface wear with minor to moderate cover creases.

Average used copy with significant moderate wear. Overall look is as if read many times and handled with some care. Corners may have blunting, cover may have low reflectivity, spine may have a moderate roll or up to a 1" split, staples may have discoloration, and pages are tan or brown but not brittle. Minor cover soiling and minor to moderate staple tears allowed. Up to 1/4" triangle may be missing on corner or edge. Cover may have moderate to significant surface wear with moderate cover creases. Cover and centerfold may be loose, but may not be detached.

Used copy with substantial wear. Overall look is as if read many times, but is still complete. Corners may have rounding, cover may have low or no reflectivity, spine may have a roll or up to a 2" split, staples may have discoloration or rust, and pages are tan or brown but not brittle. Moderate cover soiling and moderate staple tears allowed. Up to 1/2" triangle may be missing on corner or edge. Cover may have significant surface wear with book-length cover creases. Cover and centerfold may be loose or detached.

Used copy with heavy wear. Overall look is as if read many times with little care, but is still complete. Corners likely rounded, cover may have no reflectivity, spine may have a roll or up to 2/3rds split, staples may have discoloration or rust, pages are tan or brown, and edges may show brittleness. Cover soiling and staple tears are common. Pieces of front (not allowed in FR+/GD-) or back cover may be missing. Cover may have considerable surface wear with book-length cover creases, significant tears and folds. Cover and centerfold may be loose or detached. 

Heavily used copy, may be incomplete. Overall look is not good, but hey, at least the thing's still around.