jannisa,
drink the blood out of the motor ???
I would never let you drive any car of mine
I let you test drive it alright only I would be right there beside you. I would agree with all you said, only I would only purchase a low milage certified car from the dealer never a private deal. BMW makes sure all is above board before they offer a used car for sale. They have a reputation to protect.
Just my 2 cents