Did you ask if they offer "collector car insurance"? Some insurance companies have a much cheaper rate if you put a milage (km) limit per year of driving. They need to know it is far from a daily driver. Ask to speak to the underwriter directly. Explain to him/her this car is never driven to work, only on weekends, and never in rush hour.
My policy is less than $100 a month. However I am limited to 5000 miles a year.