Boost is matching Officeworks and selling the $30 Sim Starter Kit for $10 including delivery.
You can purchase a maximum of 5 per transaction.
Also current promo is 40GB data for the first 3 recharges then 20GB after that on the $30 per 28 days plan.
Highly recommended because it's on the Telstra network, however the annual Sim card has increased in price and offers less, YMMV