I really couldn’t say just how rare these toys are.  However, there was one for sale in 2007 for only $65 at G503.

I did learn that the jeep on which this was based is called both a Willys MB Calliope or a MB with a Rocket Launcher unit.  I’m sure someone else knows more about this than I.

“DANBURY MINT 40’s Willys World War II ROCKET LAUNCHER Jeep Replica with Detachable and Adjustable Angle Launcher. Produced in 1995. Finished in Olive Drab. Diecast 1:16 Scale.

VERY RARE! Great Collectible for the War Veteran or Military Collector. Beautiful Condition!
If interested, please contact Rose at 724.251.4772 or email a response to this posting.”

http://pittsburgh.craigslist.org/clt/3056661107.html