alt Hacker NewsGame console dev kits usually cost more than the consoles they're for, not less. They're not mass produced at the scale that the consoles are, and they're sold or leased to companies expecting to make several orders of magnitude more back off the products they create with the dev kits.
There isn't a very direct comparison of Oculus products to game consoles like PlayStation, Nintendo, XBox, or those in the distant past. It is interesting, and they have a lot of the same market forces at play, but I don't think they behave by the same rules.