This is a small post shop in UNSW near the Matthews Arcade. Depending on who is serving you, the staff can be friendly or a bit less friendly. Today I asked if I could get a pack of stamps, and the girl (probably a student herself) said, "No...I don't think so". It wasn't very helpful. She did tell me the cost of posting a letter overseas but didn't let me know if I could buy more stamps from the shop. Anyway, I know what to do now, but it was a bit strange, her response to my question.