Historically I have paid $30/mo. There are only 2 reasonable options where I live; Comcast cable and CenturyLink DSL. The speed is roughly 30Mbps download.
Every year I swap companies to remain in the promotional period. Anyone paying more is a sucker. The "loyal" customer gets the privilege of paying more than someone who has just signed on.
I separate my modem from WiFi router so that nothing needs to change except the modem when I do my annual switch. Sometimes they give me an extra year at the promotional rate, but often they don't, and I have no tolerance for not getting the lowest price offered.
Currently work pays $50 for my Comcast 30/5 Mbps connection at my house. I include everything in my roommates rent to keep things simple and predictable for them.
Wave cable internet is included in my appartment rent. The speed varies based on usage from others. As of right this moment, this is what I'm getting:
Utilities need to be spelled out prior to moving in somewhere. I'd also watch your stuff if you're living with a dishonest roommate. Maybe you should get a $30 internet service and charge roommates $15 each to undercut the lying roommate. Better yet, rent a whole house and choose your own roommates so you aren't stuck with losers.