Logitech Signature M650 Wireless Mouse, Graphite $29 + Delivery ($0 with Prime/ $59 Spend) @ Amazon AU

This mouse is designed for small to medium sized hands. It is an optical mouse with Bluetooth connectivity. A left handed version is also available for the same price. This price is just $1 higher than an all time Amazon Au low, according to Camelcamelcamel.