The Series 75 was listed on eBay a couple of times a year or two ago and was in Sioux Falls, SD.
I would guess that it did finally sell since it was in Sioux Falls, SD and is now in Grand Forks, ND. I remember having driven by it when it was in Sioux Falls. It was priced reasonably, but many would not have liked its current color(I do). As I recall, it had had a color change at one point and was black originally(not unusual for a funeral home Series 75 sedan).
It looks oddly high in he front end in the photo like it may currently have the motor out of it.