Triggers that Make People Buy from You. Learn the right triggers that make people buy from you through what is known as sales psychology. There are actual reasons why a person will purchase something; it’s a matter of knowing which nail to hit on the head.1- Ask for customers’ reviews which in turn will create envy within other prospect customers. This method works like a charm as it make viewers reading the review want the same thing, this leading to a purchase. Envy trigger is a good way to play on a person’s psyche.2- Create curiosity by giving little information