The LEGO 42081 Volvo Concept Wheel Loader ZEUX is $107.99 at Costco, Marsden Park. Still a full pallet available when I took the photos. OOS online.
RRP is $199.99 at the LEGO store.
LEGO 42111 Fast & Furious Dom's Dodge Charger - $144.99 ($35 off RRP).
LEGO 11717 Classic 1500pcs - $89.99 ($30 off RRP, OOS online). This is the US version which includes 4 base plates (set 11717) that the Oz version (set 10717) does not have. Otherwise the sets are exactly the same. This US version is normally unavailable in Australian stores.
Finally, if you have extra money lying around, you can store your LEGO bricks in fancy LEGO Storage Drawers for $79.99. (OOS online.) These are the newest versions that have grooves on the bottom so the drawers can stack securely. Not otherwise available in Australia, but after conversion rates from the US LEGO store an 8-knob drawer + two 4-knob drawers equates to roughly AUD110-120.
EDIT: It appears the LEGO 11717 Classic set just got added to the AU LEGO Store, but sold out straight away :)