Just a quick google search shows pricing raging from as little as $1000 all the way up to $75000.
Unfortunately for that huge of a gap you are really stretching to get a "ballpark" figure. My honest recommendation is for you to search for actual classic Jeep OWNER forums and get some real world info from dudes that are actually trying to find your jeep variant.
I am not affiliated with them but Try jeepforum.com, they have about a half million users. Ask your question in one of their CJ7 sub-forum ( after you register of course)
Good luck!
1 people found this helpful.