The 750 went for $20K some years back, I am sure that the 1000 will be more particularly if they make an upgraded "S" or "R" version like Duc does. For comparison, a Duc 999 can be had for $16-17K if you shop around, but the 999R is more like $21K+ and the 999S is almost $30K (might have the S & the R backwards, can't remember which is higher).
But it's safe to say that these MV's are easily $20-30K as well. As sweet as they are, you could really trick out a comparable bike and still have money left over. Again, hard to justify. It deserves a discussion in economics of diminishing returns.