I'm wondering if it is worth selling my P4, and how much I could get for it. I bought it last May, and it has never had a crash. It has 30-50 flights, three batteries, and a modded controller which has uses an itelite range extender and can be swapped out with the larger maxxrange panel, also included. It also comes with a backpack that can fit every accessory for it in it. I run very small business, mostly as a hobby over the summer, making selling videos of houses to real estate brokers. I am considering buying the Mavic pro because it would make transportation a lot easier. It also includes a neary aerial media insurance plan which will replace the phantom, the controller, or one of the batteries if they have any damage, free of cost up to the start of this June. How much do you think I could sell the P4 for? Would I notice much of a difference in video quality? Is the range really 7km, or is it more 2-3?