There are 9 within 300 miles of me (central Texas) 3 of which have less than 1000 miles on them according to AT. Then there's another 15 new ones in that same search area. Maybe it's nothing and normal or maybe it's just the area I'm in with large cities nearby. I haven't had a chance to drive one so I'm reserving judgment until I do.
In comparison, there are zero E63's in that same area and only 2 in the US (used 2013 vehicles). 9 if you include 2012.
A new/used search of the USA for both yields 51 E63's and 260 M5's. Were there just that many more M5's produced?
My plan is to drive both, but I just thought the numbers were a little odd given the similarity in the vehicles.