Since you're in Australia I don't know a good answer, but for those in the US who may have the same question, compare shipping and no sales tax vs Apple Education store (or refurb store) plus sales tax. If looking at a base MBP 13", then best deal going is in-store at Microcenter -- but you need to be able to physically visit the store. For other models do check Apple's refurb store.
If you don't have a Microcenter and you're in the US consider a Black Friday deal. Do a web search for the leaks as I don't know if posting specifics is kosher here, but one I saw for a big retailer that uses yellow and blue colors suggests they'll be giving a $125 gift card with purchase of a 13" MBP.