Optus E5577 4G Wi-Fi Modem +

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Optus 4G Wi-Fi Modem (E5577) with 4GB $14.95 @ Coles (Limited Stock)

expired Optus 4G Wi-Fi Modem (E5577) with 4GB $14.95 @ Coles (Limited Stock)

Usually a popular deal at $29.50 but looks to be even cheaper now. Found at Coles Kardinya (WA) but assume it is nationwide, though YMMV.