Same here, Lefty. In the store at Mentone, the actual price was $21 something a metre.
I have occasionally noticed that Bunnings' web prices are (considerably) higher than the store price, FWIW.
Back on topic, I have wanted/needed sheeting like this all my adult life! I reckon I could just about tap a thread in it!
I
have tapped robust threads in 100mm sewer pipe and fittings ...
.