In Australia, how much would a Nikon D3100 body cost?
If you could tell the price for the camera and lens? Like the cheapest to most reasonable price.
Check Nikon's website and Amazon.
Given the current exchange rate I'd say about what it costs here in the States.
Why would you consider in buying anything especially a camera body from Australia? Everything here is very expensive as it is.
You can try to look on Ebay to give you perhaps a chance in obtaining a new or secondhand version; also try Gum Tree, JB-Hifi, Digital Camera Warehouse and use Teds Cameras as a bench mark. Or you could try a few computer shops such as Scorptech Computers