Got 2 original darwin stubbies at home, the original 2.25L bottles that CUB used to ship beer north in rather than the modern ones. Used to collect them for bottling but as mentioned they're not easy to get your hands on, going price is up to $10/bottle
Used to have 3 until one of them exploded about 18 months ago in a tragic 40 degree day wheat beer disaster.
While collecting the shards from all through the shed I noticed that the manufacture of these old bottles leaves a fair bit to be desired. The glass wall thickness varied significantly and was noticeably thin in parts.
That said I stopped using them, emptied the last one just last weekend at my housewarming and i'm unsure whether ill reuse them or what.
Just for info the old bottles came in 2 types; the ones with etched labels and the ones with labels stuck on.
Also if you look around you can find Victoria Bitter darwin stubbies too.