This is probably the most common issue we find we our website. The problem is generally due to one of 3 things.
A. You are in VIC, SA or WA, in which case we do not ship to these locations. They are serviced by our sister site butcherquip.com. au.
B. The State field is missing from your Account. Our system requires state and postcode to verify a shipping cost. To check this login to your account and view your Addresses.
C. You have the correct details however our system identifies your postcode as being in another state or territory. We do see this a bit with towns that border the ACT. If you have entered NSW as your state try changing this to the ACT to see if this corrects the issue.