Misty, you would be surprised how much you can clean those dirty old machines and how well they will work. Here is a link to a little Japanese 15 clone I cleaned up
http://www.quiltingboard.com/vintage...r-t169127.html and here is a link about Singer 319 in really dirty condition
http://www.quiltingboard.com/picture...c-t162425.html and yes they do sew just fine now that they are clean.