I might buy this from an individual but I most definitely would not from a dealership. They could be the nicest Mom n Pop shop out there but they are still in the business of turning cars for profit. This means they will mask stuff. Also, and Brian can attest to this, to them it's 'no big deal'. NE folks are used to rust. If it doesn't have dangling parts or piles of rust dust under it it's not bad to most of them.
I see pretty deep pitting on the Quigley components. I would want REALLY good pictures of the rain gutter, especially at the upper corners of the windshield. I would want some carpet pulled around the doghouse to verify no floor pan rust. It hides on the nicest of rust belt vans. I would look at the sheetmetal folds/seams inside the bottom of the doors. ALL of the doors. Rust likes those spots. I would want a spark plug or two pulled to see how rusty they are. Water likes to get in the holes on modular engines. I've seen some REALLY rusty which also tells you they weren't changed probably ever.
I have risked several vehicles on sight unseen buys from PA, IL, MI and a couple of other places. These days I won't touch em. As a left coaster you'll likely be appalled.
Sorry my opinion isn't all roses but I would not buy this van unless close enough to go over it personally and decide whether not I could handle the problems. Brian knows these vans and will give you the straight story but get ready for a surprise or two.
Having done it a few times I wouldn't do it again.