I'd say go for it, of course 'haggle' a lil. (You have to haggle.)
But seriously it looks like a decent package for the asking price. That's the whole deal too. Head, table, motor. Now all's ya got's to do is build a bigger table 'round it.
Sew something with it before you buy it! Does it have reverse?
edit: Determine the year and/or model # and look it up. Bound to be something in cyberspace about it.