Target has DOTM Mechtech two-packs on clearance for $9.99. These packs are available in store and online:
BB and Air Raid http://www.target.com/p/transformers-dark-of-the-moon-mechtech-deluxe-class-bumblebee-and-air-raid-pack-of-2/-/A-14237099#prodSlot=medium_1_3&term=mechtech
Starscream and Roadbusterhttp://www.target.com/p/transformers-dark-of-the-moon-mechtech-deluxe-class-starscream-and-roadbuster-pack-of-2/-/A-14237101#prodSlot=medium_1_5&term=mechtech
Thundercracker and Nitro BB http://www.target.com/p/transformers-dark-of-the-moon-mechtech-deluxe-class-nitro-bumblebee-and-thundercracker-pack-of-2/-/A-14237100#prodSlot=medium_1_6&term=mechtech
Sideswipe and Armor Topspin http://www.target.com/p/transformers-dark-of-the-moon-mechtech-deluxe-class-sideswipe-and-autobot-armor-topspin-pack-of-2/-/A-14237102#prodSlot=medium_1_7&term=mechtech
They also have Mudflap and Cyberfire singles for about nine bucks...
