Picked up one of these the other day from Bunnings in Cockburn, thought it was not too bad at under $30. Was plenty in stock, though most of them had been moved to the front of the store. As usual, your Bunnings may vary.
Normally $39.94, http://www.bunnings.com.au/products_product_ltw-28-rail-stai…
That's a very good price as I bought a similar one at BigW at $40 earlier this month.