Great price for somebody looking for a diesel chassis to swap their van body onto. This
looks like a 138" wheelbase, which means an EB would be nearly a direct swap, with the exception of the rear bumper plates (swap those too or make your own). I've also seen a swap done where the van body was simply sawed at the B-piller and welded to the cab, to avoid the wiring/hoses/steering headache.
These are not hard to find under $6,000 but this one is the cheapest running chassis I've seen so far.
2006 ford powerstroke e350 cab and chassis