My featherweight was listed as a 1942 model. There is information telling years they were made, pictures of FW's, and quite a lot of info.
My FW tech, who I seldom see as it is such a dependable machine, does buy them, checks them out, and sells them. I know he is dependable and honest. If you think you would be interested in contacting him for information, pictures, ect, let me know and I will send his info. He does this as a hobby,but is very good at it.
Be sure if it is a FW that it does sew. Buying signt unseen from Ebay is a little tricky because not all the sellers are honest. Buy from someone with a good rating and track history. Some of the sellers don't sew and don't care.
We were lucky in that respect. The machine we bought had not been cleaned and there was probably 20 feet of black thread wound around the wheel. It was otherwise pretty clean, but dry as a bone. I ordered a new belt and feet, as they were crunchy from age. I did get a tiny "O" ring for the screw that holds the face plate on because it rattled. Now she is so quiet I call her Silent Running. This one doesn't purrrrrrr. It is quiet.