Overstreet Comic Book Price Guide Grading Definitions:

9.4 NEAR MINT (NM): Nearly perfect with only minor imperfections that keep it from the next higher grade. Minor feathering that does not detract from the overall beauty of an otherwise higher grade copy is acceptable for this grade. The overall look is "as if it was just purchased and read once or twice." Subtle bindery/printing defects are allowed. Bindery tears must be less than 1/16" on Silver Age and late  books, although on Golden Age books bindery tears of 1/4" have been noted. Cover is flat with no surface wear. Inks are bright with high reflectivity and a minimum of fading. Generally well centered and firmly secured to interior pages. Corners are cut square and sharp with ever-so-slight blunting permitted. A 1/16" bend is permitted with no color break. No creases. Small, inconspicuous, lightly penciled, stamped or inked arrival dates are acceptable as long as they are in an unobtrusive location. No soiling, staining or other discoloration apart from some slight foxing. Spine is tight and flat. No spine roll or split allowed. Staples are generally centered; may have slight discoloration. No staple tears are allowed; almost no stress lines. No rust migration. In rare cases, a comic was not stapled at the bindery and therefore has a missing staple; this is not considered a defect. Any staple can be replaced on books Fine, but only vintage staples can be used on books from Very Fine to Near Mint. Mint books must have original staples. Paper is (no worse than) off-white to cream, supple and fresh. No hint of acidity in the odor of the newsprint. Centerfold is firmly secure. Slight interior tears are allowed.