Right now on Amazon you can grab this LEGO Star Wars Elite Clone Trooper and Commando Droid B 9488 for $9.44.
This is the lowest price it has been in the past six months.
The Separatists have sent a new droid enemy to attack the forces of the Republic, but the clone army’s elite troopers have a new weapon of their own: the powerful Republic artillery cannon. With elevating turret and flick missile, those clankers will be running for cover. Includes 4 minifigures: ARC trooper, ARF trooper and 2 new enemy commando droids.
(I think I only know what two or three words mean in that sentence.)
Be sure to double check the price before you buy- Amazon prices change quickly!