ISMAC will give you a better idea of the value of your machine. There you can find find the number of machines manufactured from the number on the machine. Some in the millions, others in the thousands. Don't sell too cheap. Someone who wants to repair and update a machine to resale and make a profil won't hardly give you a dime for these old beauties, but someone who actually uses these machines for sewing and will actually give them a name (don't ask me how I know) would give you much more.