From what I can see, it's called the Dr Garry Scroop collection, and a bit of googling turns up that he's an adjunct professor of health sciences at UniSA, which certainly explains the microscope collection. I suppose from there he went to cameras via taking macro shots (hence the Leica 1f and a Rolleicopi. I'd never heard of one but it looks like a microscope-mounted Rollei TLR). And that's how any collection starts, but he obviously had the means (and the storage) to carry it through to the extreme.
I hadn't seen that news special (I tend to watch tv not very much, only cartoons, and especially not much on the commercial stations), but I did see that there's also a facebook page dedicated to the auction, and a recent link to the news story there.