You could likely get a bit more for it even, it'll just take longer to move, possibly into next spring.
The detractors will be the age/mileage (which are in-line for each other), and the fact that it's not one of the most desirable engines. That said, there's nothing wrong with that engine either, and it'll likely be a good van for whoever buys it.
For me, I wouldn't buy a Quigley or an RB, but I think the average buyer would make the opposite choice on both.
I like how both the interior and the bumpers / roof rack are set up a lot.
It might sell faster if you put some rough numbers next to what the pieces were new. This clearly isn't a case where someone is trying to make back their "investment", but I have a rough idea of what went into this, and it's way more than the asking. Having numbers next to them would help someone choose this over a van that's missing one or two of the customizations.
'99 EB ex ENG KSWB news van, low rent 4x4 conversion (mostly fixed by now), home built interior.