I am now the happy owner of a 1996 850 Platinum Edition wagon. I've done some research and have discovered that it's essentially the same thing as an 850 Turbo with all the options plus a snazzy pearl-over-white paint job :)
As with any well maintained car 12 years old there are a few minor issues that caught my attention and I'm hoping that your collective experience with 850's (or Volvo's of that vintage generally) might shed light on this:
The LCD trip computer doesn't light up. Any longshot chance this might be a fuse or easily reached without taking the whole instrument cluster out?
The bottom row of buttons on the stereo don't light up either but this I can just pull out of the dash to inspect.
Thanks all, Blurp