Newegg offers Prime members the Obihai VoIP Telephone / Fax Adapter, model no. OBi200, for $48.89. Coupon code "EMCWWHB48" drops it to $29.99. With free shipping, that's tied with our September mention as the lowest total price we've seen. (It's also a current price low by $19.) This adapter supports Google Voice, SIP, and OBiTALK VoIP services and facilitates real-time fax over IP.