What kind of shape is it in, unrestored vs restored? Does it run? Does it have an engine? Is it missing parts(especially under the hood)? Does it have many non-military parts in place of the original(ie carb, trans, gas tank, whole engine, etc)? Are there body issues(dents, cancer, missing pieces such as tailgate, etc)?
A decent unrestored truck in running condition usually goes for between say $2,500.oo to about $4,000.oo depending upon the above factors. Older restorations but complete go for between $5,000.oo to maybe $6,500.oo. Restorations to like new status with all the correct parts, etc, can go over $12,500.oo. These are guesstimates mind you, but from what I've read since getting into this hobby, I thin kare fairly accurate for a going price.
Can you post some pictures?