e.g. Spicebomb Extreme $120 for 90ml, next cheapest is $135 at ChemistWarehouse.
Christina Dior Sauvage EDP $141.60 for 100ml, $175 at ChemistWarehouse
+ More savings if Shopback/Cashrewards tracks the order.
edit: If you're not into cashback, use discounted Myer gift Cards or the recent one with the added 10% bonus -