You can get a logitech G502 for 54$ at dicksmith or jb hi fi if you show them dickamiths page they'll match it.
Update: quite a few other logitech products are on sale too http://www.dicksmith.com.au/up-to-40-pct-off-selected-logite…
Update #2 10% bonus dick smith gift cards http://www.ozbargain.com.au/node/186476
If you order online from the Dick Smith main web site don't forget there's a $5.95 delivery charge.
In that case the $53.99 + $4.95 delivery from Dick Smith eBay store would be better if you want to save $1 on total order charge.
http://www.ebay.com.au/itm/Logitech-G502-Gaming-Mouse-/25177…