See Rust? Run.
The easiest way to avoid problems is to look out for the brown stuff. "Rust is a KILLER," says Allen. "I always walk away when I see it. It's not because I don't know how to fix it. I do. But it's not going to be the same. You can replace panels, but once you start with a rusty car, in my opinion, it's always a rusty car. It will never be factory-original again." Still, Allen is mainly concerned with serious rust. "If I saw a bubble or two on a quarter panel that would not bother me," he says, "but when you can see through the trunk and floors and the sides are all eaten up, there comes a point when your money is better spent finding a nicer car. It can just become a money pit."