An update to my post from a few days ago: the Leica M10 camera prototype and 50 Noctilux lens listed for sale on eBay for $35k by Setadel Studios are fake – Leica Camera confirmed to me that it does not mark prototypes in this particular fashion (N08) and deemed this to be a fake.
Update – the same seller has two more limited edition prototype cameras. The first one is a Leica M9-P Meisterstuck limited edition prototype:
The second is a Leica MP Hermes edition prototype: