I'm not from WA but just to let you know that violins come in different sizes. At the age of 5 your little one will probably be ok in a 1/4 size. Most good music and violin shops will sell you a good quality student violin (Stentor and Yamaha are usually well regarded student brands for starting out). Don't get any new instruments from eBay because you won't be guaranteed they will be good quality wood and hairs. Music teachers and schools will also be able to guide you on where to get an instrument from.
Professional violinists will mostly have very old instruments (I'm talking 100+ years old - from Italy, Germany, Austria) chosen for the quality of the workmanship, and the wood used to make the instrument as aged wood makes a better quality sound. So not necessarily sticking to particular brands as such.
Picking a good teacher is difficult - sometimes could be a trial and error thing. Our local violin shop, have been able to recommend a few teachers that specialise in very young children starting out. We have a well known violinist and performer living in our suburb but is not necessarily the best teacher to very young kids. In the end we chose a teacher by word of mouth from our children's primary school.
PM the EB member Quill
as she's a very experienced violin teacher. She will be able to help you so much more than I can.
This post has been edited by =R2=: 19/11/2012, 10:24 AM