I remember asking my mom to get me a school locker on my first year of high school. Upon learning that I have one already, my roommates in the boarding house didn't bother to get gym lockers for themselves.
Students who availed of school lockers were asked to provide own lock and key. My roommates were so unashamed to ask me if I can have my lockers key recopied! What? I wished I could have shouted, "Get your own wood lockers!". But I didn't because I was still a nice girl at that time.
So if you're looking for lockers for sale and planning to avail of one, don't tell your roommates about it!