Antique Singer Sewing Machine 1904. miniature, childs?

This is an electric 1904 as far as I can tell. J-1 40watt. Singer Sewing machine. We found it cleaning out dad's house. Mom worked for singer at one point but she was born 1918.So no history on it. It fits in the palm of your hand. I've looked and see most children's machines were crank style. Could be the size of glove machine but I understand plate working surface should be larger. Can't test it cord is intact but not looking the safest. Didn't clean it not to damage but belt driven looks in really good shape. We want to sell but for how much?