The post office that serves South Side is a few doors down from this building. This is good for those that may need mailing supplies, or postage stamps. If you wish to keep your address private for whatever the reason, then a PO Box is something to consider. Obviously, the rates will depend on the office, and box size. Usually, they come in small, medium, and large and likely to be cheaper than the UPS Store two doors up from the post office.