There are so many to choose from, from all those WWI, WWII, Korea, Vietnam, and even some modern ones that are retiring now. If you were going to get one of these trucks, jeeps or hummers, what would it be? Tanks are not released anymore.
MP US Army, The DUKW is definitely one of the standouts. I am looking for one. Fixer-upers start around $3k, but a working on will start around $50. A USCG version you see for the Duck Tours average about $150k.
The Deuce and a half is a great contender because they are the cheapest to get into right now. Most can be picked up at Government Auction between $500 and $1k. Ebay start around $1.5k, and top off at $7k.
The old stand by Jeeps are really cool, but all the military ones, restored pick up around $15k. The old civi done versions, or even the CJ-2's'3' and 5' are either really junky finds, or nice for around $4k.
The original H1 Military version, they start around $25k, and often need new motors and trannys. Expensive...