I am not sure if this is the right place to ask this or not. I have an old(? ) treadle sewing machine in a fold-away wooden cabinet. It is a "Beaver" sewing machine and I have not been able to find any information on it at all. Can anyone help me with finding out how much it is worth, or where to go to find any info on it? I can post pictures and give the serial number if it helps. Thanks to all who can help.