Pretty simplistic thinking but the government and insurance companires don't have a hold on grocery stores and hardware stores like they do on prescrition drug coverages and what pharmacies are able to charge, bill and collect.
Also when you factor in all expenses such gas and vehicle costs to name a couple, see different thread to discuss gas issues, to travel from Bowman to Dickinson or Carrington to Jamestown to buy "cheaper" meds, are they really "cheaper" when it is all said and done?