Prices are in U.S. dollars.
Not an easy option. Lately, some military Humvees have been sold to dealers, then to the public. If you're a serious collector of military vehicles with money to spend, it would be worth looking for one. If you're looking for a Hummer for dirt cheap, don't bother. Civilian models have only been available since 1992 and, since no one would spend that kind of money for a truck only to trash it, there simply aren't any old, beat-up ones around.