In stock at BIG W for anyone that has missed out previously. On sale as part of the Toy Mania sale at BIG W.
LEGO 10280 Botanical Collection: Flower Bouquet $69 + delivery (from $7.90 for metro areas)
Mod: Even though the website claims this product is part of the Toy Mania sale, it doesn't appear in either of the two catalogues. This is probably the reason why the price varies between states (it's $89 for ACT, NT, SA, TAS, & WA) or why BIG W has failed to correct the discrepancy. All moot now as it's out of stock. (Although there's a small chance more stock may arrive in stores on or after Thursday 18 June.)