So avg $100 / month as a cheap beater.

$1200 car last 1 Year.
$4800 car lasts 5 Years.

Right now.. the 2008 300C owes me nothing. It is at 309,000KM and running strong. She needs a little love in the sway bar bushings ,a little roof rust and half broken drivers door handle (ext)

Most issues worked out under warranty.
Out of warranty work was Radiator $(700) and my Cat issue (fixed with 2$ O2 Gapper )
I have changed the brake pads once and plugs twice.
I still get 27-30 mpg if I keep it under 100
Regular Oil Changes. That's it.