Between Glenwood and Hot Springs there is a scrap dealer who had quite few for $1.00 each. You will have to sort thru and pick out this ones you want, but it well worth it for a $1. You will need to do some painting on them, they look pretty rough on the outside, but are very clean on the inside.
Here is a cache that is at the guys house.
http://www.geocaching.com/seek/cache_de ... be13d8cc08
You can also try an army surplus store. The last time I checked the store North of Greenbrier on Hwy 65 the 50 cals were $4.50 and 30 cal was $3.50. I don't know how far you are willing to go? Bennets downtown Little Rock is higher.
I have friends in overalls whose friendship I would not swap for the favor of the kings of the world.
Thomas A. Edison