Experience
Alicia grew to know the regulars in the store during her years there. She knew exactly how they would behave. She knew which of them would invariably try to haggle over the price and which just took it as is. Living in a small town also meant that she knew just about everyone who walked into her store. Knowing what they would want and would do. However, a man she didn’t know walked in one day, and something told her to watch him. Turns out she was right to do so.