i have a 74 light duty truck manual and a 75 light duty truck supliment manual. the cover on the 74 manaul is riped, 1.5" x 5.5" is missing in the corner. it is also stained. all the pages are in good shape, no stains or discoloration. the only bad part is the cover. the 75 is a service and overhaul manual supliment, the cover has the lower right corner missing, hardly any compared to the other one. the first 3 or 4 pages have been chewed on by my guinea pig, it is into the writing a little bit, nothing really important. its just serial number location on axle tubes of g30 vans and dually trucks, and a warning on jump starting. the cover is also stained. the rest of the pages are in good shape. only two are water wrinkled, looks like someone left it in the rain for a little bit. (not me) im just wondering what i could get out of these, and maybe sell them if they are worth enough.