I have a 330mps connection and spend $10 a month on a modem rental after talking them down from $15 a month. I just bought a cable modem for $45. I'm not sure how to go about doing the ROI, so lets do it over 2 years:
Renting: 24*10 = $240
Buying: $45 (edit: +$10 (2 years at 10% interest))
So I'm getting about a 500% return on my investment over 2 years. Or an annual rate of growth like 125%? (lol, i really don't know how to calculate this) :)
So even though I've had the same cable modem for about 4 years without issues, lets say the one i have has a lifetime of 2 years. That's still a crazy return.
Maybe this is more /r/frugal, but I've found that by trimming these recurring costs, I've helped my bottom line a lot.
edit: as /u/showersareevil pointed out, the router i'm replacing has some functionality I'm not using and a comparable device is more than $45. Although on amazon I found one for $49. :\
Submitted March 07, 2018 at 09:17AM by shazammerbammer http://ift.tt/2oQFeGx
