@smootheye
there are camera gimbals driven by RC servos and there are gimbals driven by rewired brushless motors. the brushless motors do a better job of stabilizing the camera for really smooth video footage but they can be tempermental to tune, a pain in the arse to rebalance when something on the camera (like a lens or lens filter) is changed, and sometimes the controlling board might not like the settings it's got from one day to the next. this situation has improved in recent months but these things are still there.
servo driven gimbals are not as smooth and can be equally challenging to tune. the torque of a servo though is very tolerant of cameras and other things being out of balance on the gimbal so they're easier to use if your camera set up is likely to change frequently over the course of a project. a servo driven gimbal would be my preferred choice for still photography and is perfectly good for that for all but the most discerning viewers. a little servo driven gimbal like what you have would also do well for an FPV helicopter where you might want to record your flight using a simple point and shoot camera. the video won't be perfect but it will depend on what your expectations are.
servo driven gimbals aren't worth a whole lot because of the popularity of brushless gimbals but i wouldn't say the value of that is zero either.
that little Hoverfly GIMBAL controller is probably the best servo driven gimbal controller out there, I've got three of them.
But the gimbal itself looks like it was damaged or assembled incorrectly as the U shaped arm that wraps around the camera appears to be twisted. Maybe that can be fixed? Value is probably about what SleepyC said given that twist in the gimbal's frame.