Thumb Score: +14

Amazon.com has Transformers EarthSpark Optimus Prime Battle Trailer Playset with Action Figure, Lights and Sounds, Electronic Truck Toys for Kids 6 and Up for $12.
Shipping is free w/ Prime or on $35+.

–[list][*]2-in-1 Playset: Converts from battle station with projectile launcher to attachable trailer.[*]Easy Transformation: Switch between trailer and battle station in 2 steps.[*]Lights & Sounds: Activates cool lights and sound effects in both modes.[*]Projectile Launcher: Includes 2 projectiles for battle station mode.