The Alamo site quotes a price then asks about insurance liabilities you can choose. Are any of these mandatory? Alamo is one of TripAdvisor's preferred car rental firms. As such I trust the price quoted is 'out the door' unless I choose more insurance coverage. I still get nervous about bait and switch. The site quotes $100 for nine days but reviewing the insurance options, one looks to be 'required' which takes the price to $320.