Could be a good deal if you don't mind addressing some rust issues. Starting bid at $6k, buy it now at $8500. Looks like an E350 with full-float rear and V10 (don't think I've ever seen this on a GTRV).
I wonder if they replaced the rear door? The plaque says E250.
I'd guess it was due to rust, that thing has a lot of it, and it looks like something is leaking pretty good under the engine, based on the photo. Still, it's a great layout, and there isn't anything that can't be fixed. I'd want to see the top open to check the canvas and windows though.