I have been an 'internet only' Centurylink customer since February 2016.
Initially I rented this modem/router for $10 per month until April 2016 when I bought a brand new one off Craigslist for $50.
Just recently the Wi-Fi started dropping out and we called out a technician who was about as much use as a chocolate teapot!
Not being a defeatist I called up technical support this evening and they mistakenly informed me that I rented the modem/router according to their records and that they would ship me a replacement for just $14.99 via UPS.
Considering the price on Amazon.com is $105.99 I bit on the deal offered.
I'm posting this deal in the hope that others can benefit to.