Guarantee Cellular via eBay offers the refurbished Huawei Verizon Wireless Home Phone Connect, model no. F256VW, for $14.99 with free shipping. That's $31 off and a very low price for such a device. Features include a 1,500mAh backup battery and support for caller ID, call forwarding, call waiting, 3-way calling, and international calling.
Note that no warranty information is provided.