12-pk Pental EnerGize Automatic Mechanical Pencil (black) $2.49, 12-pk Pental Twist-Erase III Automatic 0.7mm Mechanical Pencil $3.99 + Free Shipping

Staples has a few Mechanical Pencil Sets on Sale with free shipping. 

Please note before ordering. The Staples page does say that these are for 1 dozen pencils, but the pricing that is indicated is for one pencil. So these orders could be cancelled, or you could even possibly receive only one pencil instead of the 12 (you would then have to call Staples etc..). So please keep this in mind.

• 12-pk Pental EnerGize Automatic 0.5mm Mechanical Pencil (black barrel) $2.49
• 12-pk Pental Twist-Erase III Automatic 0.7mm Mechanical Pencil (blue barrel) $3.99