On the off-chance you do that thing a lot of buyers do and put both a street address and a PO box address in to the delivery address fields when you buy, it is really best not to do that. Aus Post don't like it when it is copied on to delivery labels (so says the staff at the PO where I have my PO box, anyway), and it's not great for sellers, either, many times they can't realistically put both on a parcel delivery label, and giving them a "choose your own adventure" thing for a package is less than ideal for multiple reasons. *
If eBay no longer accept it when two address types are in the address fields, one being a PO box, I kinda gotta say good. If you want your PO box to be the default delivery address most orders go to, have that as your primary delivery address, then your residential address as a secondary saved address. When you get a warning that a PO box can't be accepted, just click a button, select the residential address, and away you go ๐ (This is what I do, anyway).
*I'm aware lots of people have obviously exceptional exceptions for doing this; I'm talking to the people who do it 100% unnecessarily.
