I personally like 100% cotton material and it's hard to get anything branded at this price here.
You need to pay in GBP (on Australian website) to get the price this low. So, don't forget to change currency on the website before you make the payment. Please see this article about getting the best currency conversion via PayPal when you pay in other currency. If you don't change the currency and pay in AUD, then the final price will be slightly more, which is still not too bad either.
There are many other casual and formal options around this price (check your style and material preference). Some examples here:
https://au.sportsdirect.com/pierre-cardin-yarn-dye-jersey-po…
https://au.sportsdirect.com/pierre-cardin-printed-jersey-pol…
https://au.sportsdirect.com/lee-cooper-long-sleeve-check-shi…
https://au.sportsdirect.com/pierre-cardin-oxford-shirt-mens-…
https://au.sportsdirect.com/pierre-cardin-slub-shirt-mens-55…
https://au.sportsdirect.com/pierre-cardin-long-sleeve-cotton…
https://au.sportsdirect.com/dunlop-check-golf-polo-shirt-men…
Some t-shirt options (much cheaper):
https://au.sportsdirect.com/pierre-cardin-large-logo-t-shirt…
https://au.sportsdirect.com/lee-cooper-logo-t-shirt-mens-598…
https://au.sportsdirect.com/team-portsmouth-print-t-shirt-me…
https://au.sportsdirect.com/pierre-cardin-panel-pocket-t-shi…
Also a deal 3 striped Pierre Cardin polos for £14