IC station Motor Control board $3.99 for 2 Days

Arduino is a great starting point for electronics, and with a motor shield it can also be a nice tidy platform for robotics and mechatronics. Here is a design for a full-featured motor shield that will be able to power many simple to medium-complexity projects.
$3.99 with Free SHipping for 2 Days from www.ICStation.com 
http://www.icstation.com/icstation-l293d-motor-drive-shield-expansion-board-arduino-p-3256.html