I bought the Matrice from an authorized DJI distributor, wynit.com. I have put my other business on the back burner to focus on my photography business. I passed the FAA 107 exam and bought the Matrice 600 to celebrate. But then I had the family emergency and can use the money I spent. I still have a Phantom3 Pro and two Inspire1s to keep my photography business going.
The Matrice is still in the shipping box, hasn't been opened, and therefore hasn't been registered with DJI yet. If I don't sell it soon, I will hang onto it and slowly build the system.
Bob