If you have a local sewing machine repair shop they may have some machines that you can test drive. I have a light weight EuroPro. I got it years ago for taking to classes and on vacation. It doesn't get used very much - it does sew well enough for piecing and even mending while away from home. I also have a little FW that is fun to use. But my EuroPro has the little acrylic table and I do not have one for the FW.
Keep your eyes open for the local Craigslist and maybe something will show up there too. Thrift stores also get a lot of light weight machines that were not abused because people got them for mending and just didn't get a lot of use.