MyProtein have had their protein powders on sale for 40% off this week, upping it to 45% for today (26 August 2022).
Their sales often go as high as 50% off. Decent deal if you go for a 5kg bag, but MyProtein used to be a lot cheaper than it is now. Current pricing runs higher than Musashi, which tells you how inflated the price is.
And some reports of really short best before dates on their previous deals (https://www.ozbargain.com.au/node/714097), so buyer beware.
Damn you're not exactly selling me on this deal hahah