How to Sell Using Psychology - The Psychology of Sales DOES NOT OFFER marketing ideas or marketing tips. What it does offer is sound science behind selling using psychology by offering psychological marketing strategies, psychology marketing research, and internet marketing psychology. It also teaches the psychology of price. Did you know that anything priced below $10 does not trigger a buying decision in a buyer? The Psychology of Sales is a must read book. Using persuasion to sell is now passe. Using psychology to sell is the rage. Tired of lackluster sales and making little or no money....