In house print salesman

Hi guy's can anyone give some insight as to what they do with their in house sales people as far as salary or commission or both? We have a family commercial print company but are always at a disagreement as to how to pay a sales person. So for many years we have always dealt with brokers and just word of mouth and have been fairly successful, but in my opinion I think we need someone out their knocking on doors and making calls so we can be more direct with a customer and maybe not have multiple mark ups on a job and we lose the work because of that. Any thought would be much appreciated .

Thanks