Hi guys i have owned a phantom 3 professional in the past and loved it, but then wasn't using it much and sold it on.. and now would like to purchase a new drone but not a phantom as they are a big big and after much thought decided on the mavic air, so i would just like to know are they the bees knees?. initailly probably going to get a used one are there anything i should be looking for with a used one.