...sales people are best used for 2 kinds of products or services.
1. High priced stuff (were a comission makes more sense, also). For example: selling yachts. The website generates the leads and the sales clerk does what he should know best: closing the sale.
2. Upsells. This is for example a seminar to write better content for your new website. You could work together with good writers. The thing is: you new clients, you know they need a good content writer _now_. And this kind of now is the phase were good sales people excel in.