I recently inherited a Sears Kenmore 1410 model (Circa 1972). It's a great machine!! A great workhorse. And All metal, straight stitch and Zig Zag. I did a quick check of our local Craigslist and there is Kenmore for sale for $65. I enjoy my Kenmore more than my Singer 15-91. I would have never thought to get a Kenmore until I had thru the years read many positive comments here on QB.
Good luck on your search. Jo