Here in the states, the D850 has been going for around $2500US, either directly from Nikon or from various brick and mortar or online dealers. The camera is well stocked at those locations. That price is a savings of $500US off what the camera normally goes for.
Occasionally I get emails from Nikon with specials on either new or refurbished cameras and lenses. The D850 is nearly always included with prices hovering around the $2000US mark or slightly above when they're included in Nikon's refurbished sales.
My understanding is that, for the moment at least, the D850 is still in production.
Just how much of a discount are you looking for? You should be aware that Nikon authorized dealers will all be selling the camera at very nearly the same price. Years ago, Nikon put their foot down on authorized dealer pricing. So, any dealer who advertises any Nikon camera at significantly lower prices is probably not a Nikon authorized dealer and should be suspect for that reason.
--Ron