Evaluating the frame rust on this 2006 Silverado w pics

[bradleyheathhays]

I'm trying to evaluate this 2006 Silverado I'm looking at buying, and since these things are old and prone to rust, I need to understand what I'm getting into before I commit to a really long drive. The guy selling it sent me a few shots of the frame, and even though it's got some rust I'm not sure how bad it is. It's more than I want to see, but is it bad enough to just say no altogether?

 

[Woodchipper]

I would skip it. My question would be regarding rust in the body. Born in Ohio and salt played heck on metal.