Mini Booms are ~$60 each and available for Click n collect depending on the model/your store.
Orange: http://www.dicksmith.com.au/speakers/logitech-mini-boom-spea…
Black: http://www.dicksmith.com.au/speakers/logitech-ue-mini-boom-p…
Black/green: http://www.dicksmith.com.au/speakers/logitech-mini-boom-spea…
Black/red: http://www.dicksmith.com.au/speakers/logitech-mini-boom-spea…
JBL Flip for $72.82, cheapest ever(?): http://www.dicksmith.com.au/speakers/jbl-flip-bluetooth-spea…
JBL Flip is definitely superior to the Mini Booms in terms of sound and output, but it has a 5 hour battery only, and requires a proprietary charger, which is why I went with the Mini Boom myself.
Moshi BASS burger $11.74: http://www.dicksmith.com.au/speakers/moshi-bass-burger-black…
Also much more on sale at Dick, check out the site. Just be careful when searching, the discounted price won't be shown unless you enter the actual product page… Wtf Dick?
JBL Flip or Sony SRS-X3 ?