The monitor displays are not supposed to be sold. They come in as display units, not taken out of box stock. The 0.00 price means the item has gone salvage and won't be back.
Not all Targets have the same clearance schedule. Even in the same area things can be clearance at one store but not at another, or at different levels.
Did pick up Street Fighter IV (360) today for $9.98. Pretty stoked about that!