Thanks for throwing in the perspective, Minnewaska.
I've just recently seen a pre-owned 2007 DS (don't recall the exact size) for sale with just 90 or so hours on the clock. It seemed odd when knowing that half of it could've been clocked even before the yacht saw its first owner.
On a general note (hope I am not getting too OT), is hour meter rollback as common an issue as with used cars? Should one treat the value with utmost suspicion unless backed by maint. invoices and a surveyor report?