This isn't On Sale at Officeworks, but I picked up one yesterday (and so far have been very impressed). I noticed that the usual selling price seems to be over the $200 mark, so thought I'd whack a quick entry here more as an FYI.
Static ICE cheapest $202 (http://www.staticice.com.au/cgi-bin/search.cgi?q=canon+mx870…)
Some specs:
The MX870 is a versatile multifunction capable of high resolution printing copying scanning and faxing with wireless connectivity automatic double-sided printing and stunning photographs
Features
9600 x 2400 Print DPI
2400 x 4800 Scan DPI
300 Sheet Capacity
Wired/Wireless network ready
2 Sided Print/Scan/Copy
Individual Inks
Fax Modem 336Kbps
35 Sheet ADF
Dimensions: 491W x 437D x 226H mm; 11.8kg
Manufacturer's Warranty: 1 Year
Consumables:
Black Ink Cartridge CAPGI520BK
Photo Black Ink Cartridge CACLI521BK
Cyan Ink Cartridge CACLI521C
Magenta Ink Cartridge CACLI521M
Yellow INk Cartridge CACLI521Y
USB Cable sold separately
I think the old MX850 is better if you can still get it. Very heavy duty.