I bought a DCC822 in 1995 or 1996. Yes I bought it at the Philips employees store so I got it cheaper than retail value, and I don’t remember what I paid exactly, but it was definitely NOT 3195 guilders. Judging by what I now think it was probably worth, I would say I probably got it for no more than 400 guilders, and that was a lot of money (I just started a new job so I had some money to burn).
As Ralf already said, this is some sort of hybrid (which would actually look pretty good in my current car because it has some of that faux wood on the dashboard), probably made by a previous owner who upgraded from a DC722 to a DCC822 and liked the look of the old radio better. It looks nice and is somewhat interesting for its uniqueness, like a DAF car that was converted and customized for the queen would be valuable because of its uniqueness. But I don’t think it has a lot of historic importance unless there’s something on the inside that makes it that way, e.g. hand-soldered circuit boards or a development version of the tape drive or something that might indicate that this is a 722 that was converted at Philips to become one of the first DCC822’s.
Bottom line: it’s an interesting collector’s item, but I hope you didn’t pay $3000+ for it…