Most Expensive States Our analysis of the cost per click of advertising across fifty-two states in America indicates a dif- ferent scenario for each of the three categories. For the Pharmaceutical category, California, New Jersey, and New York appear to be the most expensive states. For the Dental category, Arizona, Texas, and Colorado are the top three highly expensive states. And for the Hospital Network/ Healthcare Providers category, Texas, California, and Florida happen to be most expensive states (in the respective order).