I had the same issue, when I looked online the options were dismal and highly expensive. But when I visited the Xfinity store in person, they had multiple tiers

I had the same issue, when I looked online the options were dismal and highly expensive. But when I visited the Xfinity store in person, they had multiple tiers of options I could choose from. Currently I'm on the 1.3 gigabit plan at roughly $100/mo. You may or may not have the same luck by visiting in person, or calling on the phone rather than browsing their plans online.