WIW 1968 barracuda fastback
its really all going to depend on how far the rust has gotten into the car. in my experience, when you get a good amount of rust on the outside, the trunk and floor pans are just as bad if not worse, just because they say they are good, until you rip it apart, you wont really know. otherwise i would agree with the previous posts. where you run into more trouble is when all the stainless and bumpers are bent up have to be replaced or fixed as well. so basically you end up replacing everything.