I think generally, etsy works because they can sell small runs of handmade things at a premium to cover costs (not the only reason). I'm not sure what the costs are to get small runs of circuit boards made, but it may push up prices of small runs of electronics to be much higher than what we're use to paying--and people generally don't think of electronics as being 'handmade' to justify paying the high premium. It's not a show stopper, but it's something I'd watch out for.

That said, it might work for addons for already made platforms like raspberry pi, arduino, etc. I think it's worth a shot to try it out. Keep us posted of your progress.

As for feedback, please give me the option to load as many items on a page as I want.