But there is a good old farmers trick to finding what you need and its called Clearing Sales.
Farmers know that every farmer is a wealth of historical equipment storage, but one is hardly likely to drive up someone's driveway track to see if their neighbour has something they want. Its not good form, its not polite.
So everyone in rural areas throughout Australia hangs out for the Clearing Sales when farmers are ready to move on. They can't take it all with them, so its auction time. These auctions are usually held on the farms because there are so many lots to get through. Sometimes the district ladies will also provide sandwiches with tea and coffee for a small charge when the auction is a big one.
Sourcing things like large brooder heat tables, metal nesting boxes, chick carrier boxes from hatcheries and more are likely to be found at a clearing sale. I'm sure you can think of many more. Maybe just cheap rolls of chicken wire is what you are after. Every sale is a mixed bag of goodies. You never know what you might find. I call it a serendipity buying.
Where they are and When they are on?
Local country papers often list the sales.
Or check out national listings on farmclearingsales.com.au