If you establish a price range first, that will make suggestions more useful.
Edit: I am also wondering what you mean by a free motion foot attachment. I think most of the vintage machines are capable of taking a hopping foot or, at the very least, a darning foot. Both of those are used for free motion quilting. If the machine's feed dogs don't drop, they can be covered with a credit card and actually some people find it easier to FMQ with the feed dogs up (just being sure to turn stitch length to zero).
Last edited by Prism99; 11-18-2013 at 07:26 PM.