So I'm looking at a low mileage E64 2010 M6. A BMW dealer has it and he's offering two warranty programs for the car. The first is a mechanical mostly warranty for 48 months or 48k miles for $6,350. The second offering is a bumper to bumper sort of CPO OEM warranty for $6,998. That's a lot of money.........but the price for a V10 is much higher. Should I take a chance? The car was not driven much and the last few years only a few thousand miles. What do you guys think?