$18k will get you a decent M5. If you are concerned about cost of owning or maintaining costs associated, you are considering the wrong car. M5's are great cars but are expensive. They are expensive to maintain, run, and insure. They are fun and fast but maybe you should buy a less expensive car and save some more money so you can have a little nest egg set aside for repairs then buy the M5. Things break from normal wear and tear and will always need to be taken care of. This way, you'll be able to pay for repairs instead of letting it sit while you earn the money to fix it. I see you are 19. I strongly urge you to check how much insurance will run you as well. Good luck!
Last edited by dragoncoach; 05-21-2009 at 04:48 PM.