It is very hard to find right parts and almost impossible not be overwhelmed after a mind blowing search in endless list of parts. I have listed some ready to fly (RTF) drones which are most sold on banggood.com. Also, You will see that some drones listed are BnF (Bind and Fly) which means; these drones do not come with a radio transmitter & receiver. Please be warned before you make any purchase!
I hope this will help to beginners as a start to this amazing hobby.