The good guys has the Logitech M325 for only $18! Bad thing is, they've almost ran out. If you're like me, and can't make your way to the good guys and still eager to get this bargain (full price is around $35), go price match! I just price matched at Big W this morning. I'd assume somewhere like Office works would do the same (If so, Office works will beat the price by 5%).
Note: If you've checked out the good guy's page, you may notice that they've run out of stock at the store I linked you to. To be on the safe side, when you ask for a price match, load up the webpage on your phone, which does NOT say "online price" or "no stock available". I got away with it easy =)
Otherwise, another good deal on mice, is at JB-HI-FI, selling the Microsoft Wireless Mouse 3500 for $19. Great for those of you who need a new mouse!
Out of stock now it seems :(