If you decide on a flow control Rototap bulk buy then obviously beside the purchase price you will also have shipping & handling.
That worked out (through Micromatic anyway) at US$27.50 per tap 3 years ago.
Then, if total cost of taps + shipping comes to over AU$1000 landed (and it did) you will be stung by Customs for Excise + GST ($33 per tap 3 years ago) + storage charges if you farf around & do not pay the import duty immediately.
Just under 3 years ago a Rototap cost just under US$88 at Micromatic’s bulk buy price & all-up, came to $150 per tap delivered. Probably more now that the Aussie dollar is down to around US$0.74 these days.
If there’s a way to avoid paying import duty we would have loved to have known about it at the time.