They quoted me R110K for my F10 M5 and it was a pitiful power increase. At least this one isn't too bad on paper. This was at a time where a JB4 would get you more (like double the gain) for R10K and gave you a lot more visibility and control

. They used to say this was more BMW's cost to keep the plan intact. I am 100% sure the actual gain was going to be less too.
BMW really is milking these things with the M Performance parts as well - the pricing is out of touch with reality. I mentioned elsewhere their quality is not what it used to be (and the manufacturers supplying them are not of the same 'tier' as they were before.)
I suppose this is the world we are in - ever more money for ever less service/quality/quantity