I believe this model is typically $500+.
Bing Lee also have this for $399 Here
HN also have the multi-floor model for $499 which adds a different handle and hard floor head over the $399 Graphite model.
Not sure when sale ends.
Thanks to Outlander with this deal: https://www.ozbargain.com.au/node/490304 which prompted me to look for other models. I'm now picking up the CX1 multi-floor from HN later today.
Edit: as noted by Kdw26488, Cx1 Graphite can be had here on Bing Lee ebay for $387.03 (using code POTTER) + $9 postage.