Where can I find out how much a sewing machine is online?

I found this site but no prices
It lists their conventions.
Forthcoming Events (http://www.ismacs.net/events.html)

This has a price list but I don't think they sell them
sewing-machine - Shop & Compare | eHow.com (http://www.ehow.com/shop_sewing-machine.html)

The Free sewing machine looks like it is made by Brothers. You might want to type in the search engine any information like the series number if you have it and whatever else you know about it.