During the almost 7-1/2 years that I've sold on eBay, I've sent to APO Boxes. I've not had any buyers experience any lengthy delays in receiving their envelopes or packages when sent via Standard, Other Letter, Small Packet or Expedited. It's a service that is offered to military personal and their families living abroad.
Expedited is SURFACE shipping and takes a long time to get to a border state as well as an APO. Most definitely the category has been misnamed by Canada Post which always requires an explanation to the buyer!
APO's are safe!
Susan
momoftwingles2