I concur with Steve. Your best bet will be the auctions. I've been in government surplus since '99. Bought and sold a number of vehicles in that time. I've learned a thing or two about how to buy and what to avoid. Best bet is to call the site and ask if there's a mechanic or the vehicle records available. That will help you avoid the bondo-buckets and Band-Aid/Duct-Tape buses. Look to California/Arizona/Colorado/New Mexico/Texas regions for the best rust free buses on the market. If you buy local up there, plan on LOTS of Ospho and LOTS of effort in repairing the rust holes in those buses. Me, I'm lazy and bought my bus in CA, flew from TX out there and drove her home. Sure beats years of never-ending bodywork.....
Just my 2 cents...
Firearms stand next in importance to the Constitution itself. They are the American people’s liberty teeth and keystone under independence. — George Washington