I just did a post in the forum about E9's worth. It is all over the place, I know of several whole running trucks going for $2500 and up. Good running inline pump 500 engines fetching $6000. Put your truck up on the for sale section at your price and see if you get a call. Washington has guy still running them. Condition and location is a factor to how is interested. I would be but I'm in AZ to far for a spare engine.

can you send me some pics to lineman4438@yahoo.com. thanks. Bob

i would be a buyer with more information message me and lets talk

Every builder incl.mack has good and bad engines or great and not so great engines! Just ask the owner ( or knowledgeable  driver)preferably more than one about price And reliability.