Just got an email about these Kogan prepaid plan (redcued again by 70%) Very Good value for money. Only valid for a month; although almost simlar offer came last month;
UPDATE: DEAL EXTENDED to 29/4/16
Almost similar to last time except the sim is included (older deal had to purchase a starter kit for $4.90)
https://www.ozbargain.com.au/node/233905
^For Personal use only. Discount available on 3XL 30 Days or 5XL 30 Days recharge. Offer subject to change. Not transferrable and not redeemable for cash. Discount applies to recharges prior to 5PM (AEDT) 31/3/2016. On the promotion end date, 3XL 30 Day recharges will revert back to $29.95 and 5XL 30 Day recharges will revert back to $36.95. All prices include a $0.05 SIM charge. Subsequent charges do not require SIM purchase.
UPDATE: DEAL EXTENDED to 29/4/16
I wouldn't buy a Kogan branded mobile service. Was stung in the last debacle, they behaved badly IMHO.