Found AV receivers to be much cheaper when sourced from Amazon France or Amazon Italy
Local Prices:
SONY STR-DH520: $399 from BigBrownBox.com.au - http://goo.gl/OAY5o
YAMAHA RXV373: $499 from DomayneOnline.com.au - http://goo.gl/P41aG
YAMAHA RXV573: $645.95 from 247deals.com.au - http://goo.gl/Cl0tt
SONY STR-DH820: $726 from VideoPro.com.au - http://goo.gl/LqzsT
SONY STR-DN1020 $761.95 from GraysOnline.com - http://goo.gl/BLV8l
Amazon France:
STR-DH520: $272.44 - http://goo.gl/cdciP (non affiliate link)
http://goo.gl/z66EP (affiliate link)
STR-DH820: $438.15 - http://goo.gl/1KNYF (non affiliate link)
http://goo.gl/A0uUS (affiliate link)
Amazon Italy:
YAMAHA RXV373: ~$309.97 - http://goo.gl/rWX5P (non affiliate link)
http://goo.gl/E623x (affiliate link)
YAMAHA RXV573: ~$467.29 - http://goo.gl/2s3vp (non affiliate link)
http://goo.gl/89Tw3 (affiliate link)
STR-DN1020: ~$569.50 - http://goo.gl/H1vn1 (non affiliate link)
http://goo.gl/txIgh (affiliate link)
Also one Yamaha RXV773 left for ~AU$662.35. Costs around $1299 in australia.
http://www.amazon.it/Yamaha-RX-V773-Sintoamplificatore-color… (non affiliate link).
http://www.amazon.it/gp/product/B007Q05AXY/ref=as_li_qf_sp_a… (affiliate link)