A disenting opinion:
My friend has one of these; an M1083. Less than 10,000. Paid $14000 for it from a private party who purchased it through government auction. It's been very problematic; mostly oil leaks and electrical problems. If you are a good mechanic familiar with Diesel engines then you would have some fun with this vehicle. If you are not; or have limited funds, then STAY AWAY!
He has already put another $5000 or so into it, and more $$ to come.
It is a totally awesome vehicle and will climb right up a wall if you want it to. But top speed is only 50 mph; so don't plan on any highways or interstates. The tires can be out-of-round making for a bouncy ride; and the suspension is tough for a rough ride. This vehicle was designed and manufactured for war; it is significantly beyond the capability of most people.
Take my advice and don't buy one of these unless you want to continuously throw money at it.