Keep in mind he's quoting US prices, so it's probably about double that for an Aussie. I work in Sound and Vision at a Kmart and we've got 5 packs for less than $30, so not *too* pricey...
From Dick Smith I've gotten 5 packs of Verbatim DVD+R DL for $12.99AU
Also 5 packs of TDK DVD+R DL for $17.99 (I bought these when they were out of Verbatim's, don't know about their quality, but can't be too bad since they are more expensive)