People value things more just because they own them. People often underestimate how much this affects their preferences and the prices they set when selling. This can lead to making low offers when buying things from others. In a study, people acting as buyers offered too little for items owned by someone else. Even though they learned to offer more over time with the same item, they didn't do the same with new items. This shows that not realizing the impact of owning something can lead to making bad decisions when buying from others.