for anyone wondering or worried about cashing in in Australia (which would best be avoided by a flight to Swizerland anyway), go to travelex, and take just one note, ask them to check it for you.
they will pull out their book with all the currencies from the world, and it has a nice 25,000 dinar note picture there.
they may not sell, but will definately buy.
just a case of waiting for it to be worthwile.
i checked at Bondi Beach branch, Travelex.