I wondered about that! LOL!
I first thought the "skirts" were hiding rust holes, but I examined as closely as I could and couldn't 'see' any evidence of rust holes. Then I thought "is that supposed to be for.... aerodynamics??"
Which one is true I don't know.
I'm not sure it's even for sale yet. Haven't heard from the owner but he's supposedly out of town. It's worth a follow up visit if I don't hear from him in awhile.