Wow, very nice work! Figure your time is worth at least $20 US per hour. So $500 plus materials.
As you get faster at it, your time will decrease and I guess you could charge less and the quality will go up. You may want to hold on to your first few though just for sentimental reasons. That and when you become famous, it will be worth lots.
I'd be fine and happy with selling it off for $500. If I could churn out at least one every couple weeks, (and could find sellers) it'd be more than I'd make working minimum wage at a 40 hour a week job i suppose. Not that i'm going to quit mine to start making these full time....yet.
That's a great piece of craftsmanship, and a very complex design. Do you really think that it would be solvable? It seems very difficult, but I'm not familiar with this type of puzzle.
Did you use any sort of 3D software to create this monster?
No 3D. Rough sketches for the independent sides, else it was all in my head. Basically I broke it down into a few parts: coming up with a design to just make the panels slide and not fall off, and then experimenting with this whole keyway design so you actually have mini sliders to move on each panel. The moves per panel are independent with each other (on the main 4) so it wasn't too difficult to visualize. (built one by one) The whole thing was being designed as it was built, so it took forever. Then I slapped on the centripetal side and the other slidey one (again experimenting with different slider types) as a bonus.
And yeah it's completely solvable. There are a couple dead ends though
Regarding difficulty; it's not too bad. Things are pretty linear, and there's one guessing spot involved. (2 out of 3 picks with lead you to dead end)
That is, if you can correctly figure out that you have to physically spin the box to start off...I've never seen anybody I let try it out even think of that yet. xD
The main thing with figuring out how to maximize move count on these is to make it so you have to work in reverse once you hit a certain point, this being done with pathways that snake back and forth. The reason why my new box hits so many moves is because it repeats itself many times over, and multiple sides must be 'solved' to reach certain further positions. I'd like to post pics to make it more understandable, but it seems as I didn't get any pics of that side xP.