Does NASA sell things?

Given the esteemed reputation and role of NASA in space exploration and scientific research, it begs the question: Does NASA, the National Aeronautics and Space Administration, actually sell things? The organization is widely known for its groundbreaking missions, scientific discoveries, and contributions to humanity's understanding of the universe. However, one might be surprised to learn if NASA ventures into the realm of commercial transactions. Are there items or services that NASA offers for sale to the general public? If so, what are they, and how does this fit into the agency's overarching mission and goals? It's a curious inquiry that begs for clarification and understanding of NASA's broader operations.