I just sold my Apple Watch for $250. I was now going to by a new tech toy. I was thinking of either a Quadcopter or a 3D printer. I have a GoPro that I could mount to the Quadcopter.
There is a substantial learning curve to setting up and flying a competent quadcopter, but it is a great hobby.
If you get both, you can make parts for the quadcopter.
I'm not sure about the relevance of selling your watch for $250?