I want to get my first decent sized drone, I've flown hobby grade RC planes and small quads. Best buy has a Phantom 3 pro or a Phantom 4 standard refub within my budget with a second battery for either. I'm assuming the newer generation is better if the price is about the same price? I've had lots of good deals with other refurbished stuff and couldn't tell the weren't new, are DJI refurbs good value?