I've never understood why people throw out these machines. Being a Singer, they go forever. Also being a Singer, you can contact them and still buy spares for nearly every machine they have ever made.
I am going to pick up my 4th Singer sewing machine today. It's a Singer 29k15 leather 360 patcher, in need of lots of tlc. It will join my 1922 99k, my 1950's scrap yard purchase Capri 413 (paid £10 for that), and my modern Singer (plastic, but lots of different stitches).
Don't be shy about contacting Singer for advice, the women techies can strip and rebuild these machines with their eyes closed, and are happy to advise.