I can find a V8 M in my price range, it would just be higher mileage than the one you linked. I agree that a vehicle that large and heavy needs a V8.
There is one M56 with about 127 or 137k on it on the market. It has been there for ages. I think both me and another poster both looked at it...
Apparently it was possessed by electronic demons well beyond sailor's ML. Not even in the same galaxy kind of demons.
I looked at its service history and I've never seen another MIJ car that would be so cursed.
"Price excludes all applicable taxes and licensing. As per OMVIC regulations vehicle is not driveable, not certified, and not e-tested. Certification and e-testing available for $499."
- sooooo, $499 later, still not derivable. At least they are honest about it.