according to most sales stuff, including the Standard Catalog of Military Vehicles, an M-54 with a winch is worth a grand more, and one with a Mack diesel is also worth a grand more than one without. But thats the nice thing about this hobby, alot doesn't make sense, and nobody's "dumb"... just some people have more answers than others. I've got more than a few trucks, but being a tug captain, I know VERY little about them. Just LOVE collecting them, and my wife loves this hobby compared with the last. I owned my own tug, she could never find me. Now, she only has to look in the barn..... I'm our there learning....