soiled : Generally refers to minor discoloration or staining.

fair- : Used to describe a book in slightly less than fair condition. Fair describes " a worn book that has complete text pages (including those with maps or plates) but may lack endpapers, half-title, etc. (which must be noted). Binding, jacket (if any), etc., may also be worn. All defects must be noted." (defined by AB Bookman's Weekly)