Ann: May 2017 Operational Update, page-363

According to Best sellers rank and Jungle scouts estimator there has been very little movement.
Currently sitting at # 7742 in Camera and Photo.

Which estimates <5 units per month.

Quite a few drones on the top 100 best sellers rank in camera and photo and #7742 is a long way down the list.

This is just my opinion from the research I've done, not meant to offend or taken as advice on your investments.

rather than post the links time and time again this info can be easily found via google.

Good Luck

Cheers :)