Deal on Thermaltake V9 PC Case @ $77 Down from $97

I found a deal on a Thermaltake V9 PC Case, in Officeworks on Anzac Highway, Adelaide. I don't know if the offer is available elsewhere too, but you can get the case for $77, down from a regular price of $97. This is a middle tower type case, weighing 6.29 kg / 13.87 lb, it has transparent side window, of (HWD) 462.0 x 208.0 x 485.0 mm, cooling system front of 120 x 120 x 25 mm fan TurboFan (1300rpm,17dBA) Rear (exhaust) : 120 x 120 x 25 mm TurboFan (1300rpm,17dBA) Top (exhaust) : 230 x 230 x 20 mm silent fan Built-in MB Tray (intake) : Optional 70 x 70 x 10 mm silent fan Built-in Drive Bays - Accessible - Hidden 11 4 x 5.25’’, 2 x 3.5’’ 5 x 3.5’’.