Coles did a half-price offer on Vodafone pre-paid broadband usb modems a few weeks ago.
They are now doing the same for Virgin.
$24.50 for a modem and 4GB of data if activated by 31 Dec. Usual price $49.
Better than the Vodafone deal as the modem has a micro SD slot supporting 8gb.
Not sure what modem it is. Sales starts boxing day.
PS: modem locked to Virgin but can be unlocked for free with $80 recharge.
I think it's a Huawei modem and can probably be unlocked as detailed in the last Vodafone thread.