I don't know why this is asked every week or two, (as if it had never been asked before;
). It's pointless. There are so many variables. Age. Location. Record. Family members who drive. Discounts for multi car and/or car and house, etc.
Mine's $335 every six months. Yes, it's full coverage. State Farm.
Get quotes from different companies for you and you will find out how much you have to pay. Full coverage insurance for an M3 isn't much different than full coverage insurance for any other $60k car. It has more to do with the driver and their circumstances than the car itself.