Seems everyone likes the Quantum powerball.
25 pack = $4.99, you can order a maximum of 5 packs (125 tabs)
Shipping seems capped at $10 (I tried VIC and NSW addresses)
So that's 125 tabs for $34.95 = 28c each delivered.
Good if you wanted a smaller amount to try
Should get them just in time to cleanup after Christmas dinner then.