We've been professionally buying & selling Comic Books, Records, Games and other collectibles since 1977.
MINT (M): Basically a perfect book
NEAR MINT (NM): Like new or newsstand condition, carefully read once or twice then put away, almost perfect; tight spine, flat and clean; just enough minor defects at close inspection to keep it out of the mint category. Could have a pencil arrival date, a small flake of color missing at a staple, corner or edge or slight discoloration on the inside cover or pages. Cover has most of its original gloss, several small spine bends are allowed if they do not break color. Most new comics are in this category when purchased.
VERY FINE (VF): Slight wear beginning to show; possibly a small wrinkle or crease at staples or where cover has been opened a few times; still clean flat with most of the cover gloss retained. Slight yellowing or minor bump at a corner accepted.
FINE (FN): Tight cover with some wear, but still relatively flat, clean and shiny with no subscription crease or tape repairs, only minor writing allowed on cover (ex. Initials) A few stress lines around staples and along spine are beginning to show; small corner fold or crease, minor color flaking possible at spine, staples, edges or corners. Moderate yellowing accepted.
VERY GOOD (VG): Obviously a read copy with original cover gloss almost gone; some tanning but not soiled; some signs of wear and minor markings but none that deface the cover; usually needs slight repair around staples and along spine which can be rolled; cover could have a minor tear or subscription crease staples could show signs of rust. Cover could be loose from one staple or a loose centerfold; no chunks missing. This grade comic is still a solid collectible copy.
GOOD (GD): A below average copy complete with both covers (although cover may be detached) and no panels missing; coupon may be missing as long as it does not affect the story. Moderately soiled or stained or marked with an accumulation of possible creases minor tears or splits, rolled spine, rusty staples and color flaking, but perfectly sound and legible. Minor tape repairs can occur and some browning (although not brittle) acceptable.
FAIR (FR): Very heavily read and soiled, but complete; cover can have pieces missing, tears, multiple folds and wrinkles. Spine may be partially split. Book could have a missing centerfold or page if the comic still has other complete stories. Book may be damaged by the elements but still completely sound and readable.
POOR (PR): Heavily damaged to the point that the book is no longer collectible, a reader or filler copy until it can be replaced.
(Keep in mind that a comic book may have a peculiar combination of defects and wear which may prompt the condition to be lower or higher than the typical grade assigned. These type of defects will usually be noted in the description of that particular comic book, especially if it is a higher grade.)