I would definitely buy them older machines. On Craigslist, you should be able to get a 50's era machine in good condition in the $30-$45 range. They last forever, have no plastic parts and are forgiving of beginners. I bought my 15-91 in a cabinet for $50. It will sew through anything you can fit under the presser foot. I also have a 1959 Singer 301 that is fabulous. I had a 1963 Atlas that was PINK. and also sewed very well.