This deal may not be as good as the ebay 20% off but it is probably the best deal going around for now given it comes with a free cover (worth $31.95 according to Myer's sale price on its website). Specials also available for other Q series as well as Weber accessories. Don't forget to use Myers gift card currently on sale at Woolworths (for Everyday rewards members) or use the Coles Myer giftcards if one is able to get these cards at a discount.
EDIT: Looks like the discount is associated with the VIP sale tomorrow, so changed the expiry date accordingly. The bonus cover however is valid till 24th December.
$10 cheaper than Masters but Master have 10% off from tomorrow https://www.ozbargain.com.au/node/220072
no cover though like Myer.