Approximately how much would you expect to pay for 1gbps dedicated fiber from Comcast in an on net building?

My company is out of contract with Comcast and the reseller I usually use wasn't able to give me a quote since I'm currently an active customer. I just got a quote from at&t for $1900 / month for 1gbps (3yr contract) which is less than we're paying Comcast currently for slower speeds. I really don't want to go through the hassle of switching but I felt the at&t quote was amazing. Although my past dealings with at&t have also been lackluster.

What should I expect to pay Comcast for 1gbps? I'm just trying to arm myself with info before I start dealing with them directly.

Thanks!