Here's a link to somebody who has listed a whole bunch of really valuable (free) links to sites that list Singer serial numbers and give you age, etc. and often value estimates. (Scroll all the way down the page to see her comments, and then the link lists she found) http://www.squidoo.com/Antique-Sewing-Machines-Value-Vintage-Singer-Atlas For example, your machine's serial number means it was produced in 1913. Check the links she gives and find out as much as you can. However, value estimates can vary greatly depending on the source, and the country of the source, so don't consider them as overly accurate. It's worth as much as the most interested collector would pay for it, after all. You need to find out as much as possible about the model, age, and condition etc. of your machine before it can be valued properly. These links should help in your research. There are many others, too, if you google the phrase "value of antique singer sewing machine".