If my math is correct, if you purchase the Dyson V10 Absolute+ off David Jones at $999. You can:
Take 20% off if paying with afterpay (save $199.8) = $799.2
Claim 10% cashback off $999 with cashrewards* (save $99.9) = $699.3
Get a $50 David Jones Giftcard as part of their special offer for buying a dyson product at 'fullprice'** (save $50) = $649.3
*On cashrewards David ones page, the terms and condition specifically states that cashback applies to afterpay purchases.
**Regarding the claiming of the Giftcard, it actually shows up in your cart at checkout. Even after I selected afterpay as my payment method, it remained there so I'm guessing you get it either way.
Enjoy, only a little less than 2 hours left to get it at this price. Don't think the V10 has gotten anywhere close to the legendary eBay deal a while back except for this. Let me know if I'm wrong.