One of my friends in Vermont has two 404 models for sale right now.
One, a Swiss army troop carrier and the other a German army radio van.
$4500 each. I would say they are really worth around $7 to 9 thousand each.
for a more modern one (and a LOT more money), say around $30,000, George Bull in New Hampshire is who I've bought ours from. Very good guy to deal with.
I buy most of my parts from Scott Ingham (Expedition Imports) in California.
Another great guy to deal with, and he imports Unimogs too.
That's amazing really. I presume you mean in running condition so that's just an incredible price. Many years ago, decades, a friend of mine bought a British Bull Dog that had been outfitted as a radio unit. It was in need of more repairs than he could afford at the time but it ran and was a great off road machine. Far and away a better machine than a U.S. Army Jeep.