Mint: New or Like New condition, The overall condition of the book shows little or no sign of use.
Near Mint: The pages are crisp and/or white, and the binding & cover strong & nearly unmarked
Excellent (+) Plus: The pages are not torn, missing or abused. The binding & cover are strong with minimal or little wear.
Excellent: The pages are not torn or missing, but may be slightly dirty or have some greasy prints. The binding & cover are strong , showing only some wear at the corners.
Very Good: The pages are all intact and not abused, but may be frayed at the edge and possibly greasy or dirty from use. The binding & cover are strong but with fraying and/or stains/marks on the cover.
Good: The pages are all there, but with signs of much use. Some may be taped, slightly torn, or show a lot of greasy prints or dirt. The binding & cover are intact, but may be loose or has much fraying at the edges.
Fair: The pages are all there, but may be loose from the binding, torn and/or very dirty from use. The cover & binding are much to be desired, although the book is very much readable and useful for repairs.