A free guidebook to buy a quadcopter

Hello,
Thanks A.J. for such a nice resource,i read this blog it provides such a nice information ,Regarding to this topic i read another blog on web it is also providing such a nice information.It covers all of the query of "how to fly a quadcopter",I'm sharing a url to you please go through it
http://www.topdronesforsale.org/buying-guide/
Thank You
 
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