Your Super deluxe precision sewing machine is likely a Japanese clone of the Singer 15, although without a photo it could be anything. I have an "ElectroGrand" precision deluxe sewing machine that is a clone of the Singer 15, and it's a pretty machine. They are not rare, and you make no mention of attachments, bobbins, or bobbin case. AS for selling price, you can sell it for whatever someone is willing to pay.