Gigabyte GV-N98TG1 $669.99 USD
Amex 15% off @ Exchange Rate : 1.44AUD to 1USD
Shipping $17.74
Total $837.89 AUD delivered
Cheapest in stock on Staticice $1095 @ PLE ($257.11 difference)
Requires Amex card registered as a payment method on your Amazon account to get the 15% off and select AUD not USD at checkout to avoid the international currency commission credit card fee.
- $20 mail in rebate? not sure if this doable for non-US residents.
Always a small risk of warranty issues requiring international shipping if gigabyte won't deal with it locally but high end nvidia cards are pretty solid from my experience.
Consider waiting for Pascal (ETA 2H 2016) unless you really need a new gpu now.