WTB: REALLY cheap car

Looking for a cheap reliable car. It can look like shit as long as it’s not overly rusty. GF needs to replace her saturn asap as it’s decided to blow a headgasket on top of burning a quart of oil a week, blowing tranny fluid, and having a bent steering knuckle.

Basically just looking for something that runs/drives, preferably FWD/4WD with 4 doors. Doesn’t matter what it is But anything will do can look like complete ass paint/body wise, just trying to avoid undercarrage rust. I’m sure there is a few out there, and I just missed getting the shadow. :-/

Cars that have been in minor accidents will work too as long as the wheels weren’t hit/drives straights with little to no work needed

Needs to be $600 at the MOST.