Walmart offers the Sky Rider Quadcopter Battle Drone 2-Pack for $14.97. Choose in-store pickup to dodge the $5.99 shipping charge. That's $3 under our mention from four days ago and the lowest price we've seen. (It's the best deal today by $13, although most retailers charge $54 or more.) The pack includes two quadcopter battle drones and two 2.4GHz remote controls.