Re: HOW much?
Not sure your definition of "pretty basic" but, according to the Comcast website, that price gets you a 25Mbps service. Apart from areas served by Google Fiber/Verizon FIOS/etc, "basic internet" in the US is typically 5Mbps or less, depending upon the carrier.
I do agree it's overpriced, though. I get twice that speed for US$50 from a rival cable carrier - and with significantly better customer service, too.