Amazon offers its Prime members Kung Fu High Impact for Xbox 360 Kinect for $13.91 with free shipping. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping costs $4.798.) That's $19 under our February mention and the lowest total price we could find by $7.

Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months.