Nothing will get a Cisco sales rep to drop their price faster than a lab test demonstrating that a white box with a Broadcom switch in it can do the job of a Cisco <insert product here> for 1/10th the price.
Oh, and the white box will have an REST API, which is something the rep can't spell, and the config managed and version controlled by mere mortals using something like Puppet or Chef, or heck, even bash for you old school types.