You will receive the order into the location that you enter in the purchase order. If you change your mind before the order is received then you can amend the order. The items can be moved between locations using either the "Inventory Location Transfers" menu option for single items, or the "Bulk Inventory Transfer" options to move items in batches. The idea is to end up with the items in your desp-atch location, and despatch them from there.