I think the 5DsR (low pass filter is removed) is $200 more! I think the 5DsR is fairly priced. As always, it is aimed at the early adopters, and will come down over time. Every new iteration of the 5D has been approximately that price point. I think the 5D3 was about $3,000 when it was first introduced.
Relatively speaking, when you get into the high megapixel count cameras (>40 MP) like the Hasselblads and Mamiyas, they are around $10,000 (although they are medium-format, where the sensor is much larger than even a full-frame sensor of the Canons, Sonys and Nikons). The Nikon 810 is the direct competition for the 5Ds, and that is around $3,000.
I'm more concerned that, if I bought it, at 50 MP, it will reveal all the flaws in my lenses and I'll have to upgrade to the mark II versions of each! The other thing I'd like to see is an improvement in high ISO performance where Canon has lagged behind the Nikon and Sony sensors.
At least with audio recording, I can have decades-old gear and pull great recordings. Photography still seems to be on an upward curve where every few years the tech advances and warrants an upgrade. Now being in both hobbies, well that's a ticket to the poor-house!
It is $3700 for the body only.
Mother that's expensive! No way that is good enough to justify the cost