The Unimog was sold at an auction in Santa Fe NM, last summer. It was in good mechanical condition. The Fire Dept had converted it into a mobile command post. I can't remember which municipality owned it though.
I've since seen it once, in Albuquerque, NM.
If I didn't already have a few dozen projects to finish, I'd have bid on it.
There are some really fantastic deals to be had at auctions right now. Govt agencies are still surplusing lots of vehicles and equipment, but nobody has the money to buy, so prices have fallen through the floor.
If you really want one, let me know, and I'll keep an eye out. I hit a lot of auctions.