i thought i saw some post where a 319w was being sought. here is the listing for one. i really like the look of this machine; it looks like it is ready for business. no price is listed in the post though.
http://stlouis.craigslist.org/atq/3108305966.html
here is an industrial singer for a really good price of $75. this is about the cheapest i have seen the industrial singers in my area. look at all of the throat/harp/arch/air space available for quilting.
http://stlouis.craigslist.org/for/3063506236.html