Tucson Weekly:  “It will be months before Southern Arizona’s medical-marijuana system is fully in place. . . . Those who currently use marijuana to help with chronic pain issues or other health problems buy their weed illegally. That may continue while patients wait for dispensaries to open and have marijuana available. Later, some patients may find that they can’t afford the products sold at the dispensaries, which could cost from $200 to $400 for every ounce. Black-market weed costs around $80 for a couple of ounces.”