At least some of JB Hifi's Sydney stores are pricematching a sale that Leederville Camera (Perth) has on the Canon 5D Mk3 camera - Leederville has them on pre-order for $3599.
JB HiFi will sell Australian stock (body only) for $3649 (a price differential well less than the cost of a plane fare to Perth) - the Chatswood Sydney and Paddington stores are doing so today - down from the list price of $4199.
JB in Macquarie Centre apparently may not be price matching at this point in time.
So if you have been holding off hoping the price will come down, now is your chance. They probably don't have heaps of stock in store, so those who snooze are likely to miss out ;-)
For more information, see: http://www.ozbargain.com.au/node/68061