Depends on the mode and purpose of selling. I dealt with incoming calls (who had need of our services in the first instance) and made the sale simply by creating pathos and building rapport with the customer. It didn't always work (I don't deal with that Fe crap and its dependent on whether my Fi wants to be kind to them) but worked enough to make me one of the highest selling people in my company. Now I write content for our advertising and I like to think that my (supposed) writing skills assists in bringing customers to contact our company in the first instance.
As for on-the door salesman who try to sell a poor sap something they don't need then I would say ESTP. Sociopathy and smoke blowing? Instant winner.