Hello Jimmy,
Go to Youtube and find the video called Singer 99K Sewing Machine posted by a lad in Australia on the Shangas channel. It is all about his grandmother' s sewing machine, which he has done up. I often hear from him through Youtube. He has been totally gripped by sewing machines, he loves them - he even bought one when he was in England on a visit and is having it shipped back to Australia. Next he wants to learn to sew.
Keep the sewing machine. You might find it is worth more to you than the money you could raise from selling it.