I just checked the local list prices: 6,799 Euros (2 year warranty). That obviates even the thought of a back up body for me.
I am mainly interested in this for street shooting.
Who is interested and for what purpose? What kind of focal lengths are you most likely to use with it?
In my case, it is all going to be old lenses (most in thread mount), including a Canon 50/0.95 (likely the least to be used one for anything useful - not much into bokeh nowadays. )