That was not a regular production color, but Ford would paint them whatever you wanted if you ordered a min of 5. This looks like "SuperShuttle" blue. I see no evidence this was repainted. The normal tells are hinge bolts and tape lines around the FMVSS sticker.
I'd almost put money on this being a former ShuttleVan. Which isn't a bad thing. They seem to maintain their fleet well, and historically kept their vans 800,000 miles at least. But they've been switching to Transits for the Med roof at least.
2000 E450 dually V10 wagon