Interesting Centaurus, I happened to see around 250 - 300 log books in the old offices of a defunct flying school at Archerfield a few years back (not RQ). The new leaseholders of the building refused to allow them to be returned to the students and resisted any attempts to do so. One has to wonder what value they would be to anyone else other than the owner/student.
I would have thought CASA would want to know about that, surely it is illegal to retain someone else's logbook, it is a legal document?