David Doyle's U.S. Military Vehicles Field Guide values them from 2K for a "parts vehicle...beyond restoration...to 12K for a near perfect professional restoration. Then of course there is everything in between.
A friend of mine had an M561 running, driving, stopping well...body in good condition, no canvass but otherwise pretty darn complete...sold it for 6K I believe he said.
The bottom line is...it's worth what you are willing to pay. I will caution though...they are out there but parts are not as easy to find...like a deuce or most types of jeeps etc.
OH...also they are a PITA to work on/maintain and are noisey as all get out!!
