From the perspective of conventional dream interpretation, buying stamps can symbolize the desire for new things and new opportunities, or represent the desire to establish contact and exchange with others. Not buying stamps may mean that in real life, you may feel unable to seize or miss some opportunities or lack some communication methods.
However, the interpretation of dreams is subjective and influenced by the dreamer's personal experience and situation. Therefore, the specific dream interpretation should be comprehensively analyzed from the personal point of view, combined with personal life background, emotional state, other details in the dream and other factors.
In short, in the process of dream interpretation, it is important to pay attention to one's own feelings and emotions, and think about the symbolic meaning in the dream and its connection with real life experiences and situations. If you think this dream has special significance to your life, then you can also try to communicate with friends, family members or professional dream interpreters around you to gain more insights and enlightenment.