Now I may be wrong but something(s) doesn't look right to me here.
http://chicago.craigslist.org/nch/hsh/3829583772.html
A Fashionmate 237? I think they have a one piece top, most of them have a large knob for the foot pressure, an external motor, are marked "Singer" on the back (can't see the front), have a different handwheel with a plastic-not chrome stop motion knob, no fashion disk door in the top and a single plastic spool pin on top too. Also, they stay still when you take their picture.
This one is $75, is broken and missing the foot pedal. Hmmmm, what does that cord there go to?
~G~