The CSI is a Manual also.
Whilst being a beautiful car, the 850 was really a waste of space. The 840, had just as much horsepower from 4 less cylinders. Fewer components means a higher MTBF (Mean Time Between Failures). As the CSI's had the same Nurburgring suspension package, manual and wheels as my car & the M5, it alone is not cheap to repair. At that age, you would need to look at it. $1,400(USD) per shock.
Also it had a super trick diff (Z diff off memory). None of the panels match any other model BMW and are extremely expensive.
I do love them and the President of BMWCC NZ had an 840 CSI and it was a dream to drive in. However, I would recommend an M5 before the 8 series for practicality and cost of ownership.