Is the stock you see when ordering online for pickup the same as what's available if you walk in off the street? As in, even though it's not listed for pickup, would they have stock in store anyway?
The online order to pick up in-store is the total stock for that store. At least that is what my friend that works at the apple store told me.
So if you are able to order online and pick up in store, its the same as walking in and getting it without ordering online first.