Target is currently accepting pre-orders for all iPhone 5S models. Inventory will be processed in the order in which it was received and pre-ordered phones will be dispatched depending upon demand to individual stores scheduled for launch day release. You will receive an email prior to launch day notifying you that the phone has arrived and is under embargo until launch day. You must schedule an appointment with the Target Mobile specialist prior to launch day in order to pick-up and activate your device.
Here's my pre-order receipt as a reference.
Enjoy!
Here's my pre-order receipt as a reference.

Enjoy!