Expect to pay about $100AUD for a beginners instrument. Here is a comparison of a $30 uke, to a beginners instrument - http://www.ukuleleplace.com.au/blog/comparison-of-a-30-toy-ukulele-and-the-aiersi-su021b/
Resources for choosing a good ukulele:
Advice in Ballarat - Talk to Kevin at Crossroad Music
On a severe Budget? - even if you are buying a very cheap ukulele, Kevin can get the best out of it by setting it up well, and adding Aquila Strings. < HIGHLY RECOMMENDED
Or just come along to a Thursday night Ballarat Ukulele Group at and we will show you the ins and outs! Check the Beginners Tab on the Songs page to see what is happening on any given week.