The U.S. drug war has actually created the place where weed is the most expensive that I know of. In prisons all across the United States, completely walled off and 'controlled' a gram of weed can still be obtained. It will cost you though. 50$ a gram and higher. Even in jail's that are supposed to be completely controlled environments. Drugs are still obtainable. That to me shows the obvious failure of the drug war and banning things in general!