What should I look for when purchasing a used BMW M5?

I am thinking of buying a used BMW M5 and want to make sure I am making a wise investment. What are some key things I should be looking for when purchasing a used model?

First, make sure to carefully inspect the exterior of the car for any signs of damage or wear. Look for dings, scratches, and rust, and check the tires for wear and tear.

Next, check the car's service history and make sure it has been regularly maintained. This will give you an idea of how well the car has been taken care of and its potential for future problems.