This shop serves soba noodles too, not just Udon.
Their website is faulty as the menu items (1-20) are broken links and go no-where but their noodles are certainly good value for $ especially on 6/12. The beef and tempura items are highest price ($9.80 - $12.00). Other menu items start from $4.80 (plain noodle) to $7.80.
Save this date in your calendars.  Only 2 stores and both in CBD. 
Address in the link.
UDON YASAN -Japanese udon and tempura-
186 Bourke street Melbourne VIC 3000 Australia
187 Elizabeth street Melbourne VIC 3000 Australia

 
    ![[VIC] $4.90 for Menu Items 1-19 on 6 December Only @ Udon Yasan (Bourke St & Elizabeth St Stores)](https://files.ozbargain.com.au/n/16/421216.jpg?h=92216883)

Thanks Op! Good quality udon and dashi for the price. Better turn up early as I'm sure this place will be packed!