Some of the FSJ guys here can probably give the exact answer, but I believe that the Jeep Wagoneer chassis is different than the Jeep Cherokee chassis.

If the engine, transmission, transfer case, and rear axle are all OK, and the engine runs, and the body is not falling off due to rust, I think it would surely be worth $600.

1977 CJ-7, fiberglass body, AMC 360 w/ headers, DUI ignition, Edelbrock intake and Holley 4150 carb, TF999, Dana 300, 4.56 gears lockers, York air comp, 4" susp lift, 2" body lift, BFG 35" M-T tires, Megashifter, AGR pump & box, REP8000 winch.