That's funny, a "good" paint job for $400.00
the paint alone is much higher than that, for a real quality car paint.
My clearcoat and primer is more than $400.00 and the color
in a good quality name brand paint for a color like red can cost up to $400.00 a gallon.
And if you paint everything it'll take more than 1 gallon.
It's easy to spend $1000.00 for everything to paint a car, of course there are cheaper
alternatives, but they're not going to be a real "quality paint job",
one that is painted with good primer, paint and clearcoated.
That'll be several hundred dollars for just the materials, before labor