There is no requirement whatsoever to have a 107 to sell your previously shot hobby flight drone images and video. Organize them and sell them to your heart's content now! If that is the sole purpose of getting your 107, it's a waste of time. The FAA has no jurisdiction over your sale of your previously shot images and video, shot solely as a hobby/ recreationally at the time they were made. Perfectly legal. The FAA could care less! As long as your flight is truly recreational at the time of launch, what you later decide to do with those images and video is entirely up to you!