Well, it must be my paranoia then but I'll share anyway. First, these pictures are of a regular GN someone has up for sale right now.
Anyway, the very bright rust-colored seat tracks (both sides) are what concerned me. Every one I've seen in person with almost orange mounts or rusty underseat hardware has either had major leakage or (in one or two cases) had been literally under water. Does seem worse on the driver's side.
Sure, you can expect a little surface rust from some humidity or 20+ years of normal wear and use (and a spilled Coke or coffee or two).
But this is just beyond normal from what I've seen and would make me want to tread carefully or at least get a much closer look...