old and unusable my rear end - no way Syria risks running a convoy of dud-SCUDs across the Syrian/Lebanese border knowing full well that the IAF may light them up
Well, not necessarily. We know Ahmadinejad was recently in Damascus with Assad and Nasrallah discussing the potential of a regional war against Israel. It's possible they could have sent some outdated material over the border, hoping Israel would strike. In their twisted logic, that would be cause for war based on defense. Naturally, the shipment would be reported as food, medicine, or some other harmless cargo.
In the end, though, I am more inclined to believe these were fully functional.