Dear air or madam
If you are looking for a professional UAV quad copter,but feel the cost very high,here is the model with high quality but with reasonable cost.
3 axis PTZ,3D running,360 running,carry 1000g's camera.
If you are interested,pls contact me by mail: firstname.lastname@example.org Http://www.aircraftmodelstar.com
Here attach a picture for you reference.
Mobile phone: 0086-13977382970