From today until January 17, Telstra is offering a basic prepaid Telstra broadband dongle for $29.50 with 2GB of included data. That's half the regular price.
While this is an older model Telstra itself doesn't sell anymore, it's a cheap way of getting an Internet insurance policy if your home broadband goes down. Coles and Woolworths regularly have Virgin Mobile's prepaid dongle for even less ($19.95), should you prefer Optus to Telstra.
Coles is also selling a discounted basic Telstra SIM starter kit for $10 this week, down from its regular $30 price.