I hear you on the rust. That's a big factor for me too. It's probably not a big deal with a little work to arrest it. But I don't want to deal with it and I certainly don't want to get caught with a rig I paid a bunch for that now isn't worth anything because it's so rusted no one wants it. I'll be close by in a couple weeks. If it's still there I'll check it out in person.
I still have to wonder why the previous owner would have taken $15k (+-) for it. It's such a specialty vehicle and they obviously knew that as the owner so it just seems odd to just trade it in.