The other side of that though is that it costs more in the long run just to fix the rust on a rusty shell, unless it's a really small amount of rust.
I'm really looking forward to being able to buy a really nice, clean, 100% rust free CA shell.
There is an upside though, and that is, cars are cheap in CA. And, since 75 and older are smog exempt, 76+ shells don't seem to be favorable, whereas here it doesn't matter. Basically they're cheap, and solid.
You might ask Sparks 280zt (I think that's his username) what he paid to ship a 280z from CA to NC. Should give you a good ball park figure.