[zahrc]

You can learn about the theory of sales, I’ll leave the others to post it. Long time sales specialist here: Sales is situational and hard to generalise. There is an important social aspect to sales. You need to know your customer and be able to read their reactions. All individual customers are, well, individuals. They react differently, have different expectations and bring different experience and behaviour to the table. You need to adjust during conversation and be prepared for the worst case scenarios.