So you want to learn more about drones? Building your own can help. The 3DFly Micro Drone Kit has everything you need to get started. Just 3D print your quad airframe and use the components included in this kit to build your drone. You can control your drone with the Spektrum radio transmitter. You can find the files to 3D print here.
You get a 32-bit flight controller, brushed motors, propellers, battery, receiver, and other parts to get started. Costs under $200 at this time.