I can just speak for Germany, but selling physical stuff is not that easy here. There are lots of regulations, for example on taking back and recycling used bat

I can just speak for Germany, but selling physical stuff is not that easy here. There are lots of regulations, for example on taking back and recycling used batteries, if you shipped them with the product, and stuff like that. Lots of things to take care about and have in mind, so selling physical stuff is not that popular as a side project, I think.