iPad 4 with Retina display (16GB, Wifi, Black) shipped for $458.95 from Shopping Square
They're having a nationwide $1 shipping promo for the Easter long weekend which ends on Sunday the 31st. Estimated delivery on this item looks to only be 1-2 working days.
They do point out on the site though that this shipping offer excludes digital cameras via direct shipping and that a surcharge may apply for remote areas.
I also looked into applying a coupon or voucher as well but they state on the site that promotional offers and coupons cannot be applied on the same order. :-( (http://www.shoppingsquare.com.au/help_article.php?id=57)
...doesn't make this offer any less appealing though!