For what type of broadband?? Where I live, here in Ohio, Sprint charges $70/month for an ISDN line, plus Bright.net charges $150/month for 150 hours of ISDN access.
However, since we are a Time Warner CATV customer, we get Roadrunner Cable ISP at (I think) $40/month. The Family trust pays the bill, so I am not sure. It is something like $10 more, if you don't have CATV service. More than dialup, but lots cheaper than the ISDN I mentioned.