If you're in the market for a recent Porsche, which go for let's say ~$100k, $600 is cheap to you. Cheaper than the time you'd spend on doing it yourself really, but doing it yourself is half the fun.
> If you can't afford to maintain an expensive car, you can't afford to purchase an expensive car.
Depends on how you acquire it. I can get a couple BMW's for cheap to free but I've heard too many repair stories around the campfile to blind dive into that particular rabbit hole.