Toys department have a short 1 week offer in market. Dream house has already been captured @ 50% off, but the other offer i imagine OZBargain would be interested in will be the 30% off Lego Friends & City (excludes clearance and items marked no further discounts apply, the $20 entry range). There is also 8% if shopping via shopback.
Examples (note i am no sure if Kmart have any cashbacks running)
Friends Lighthouse $59 @ Kmart, $55 @ Myer ($50.6 after cashback)
City Burger Bar $49 @ Kmart, $41.99 @ Myer ($38.60 after cashback)
Myer should not pull the LEGO items from their eBay store.