What is the value of a Seamstress Reversew sewing machine made by National Sewing Machine Company of Belvedere Illinois?

I just paid $5.00 for my Reversew Electric Machine at a St. Vincent de Paul Store ( a type of Goodwill store). It looks neat and I can't wait to play with it. It has the Godzilla finish on it. I've never seen one before I found it today!