Welcome to the board!
Like cars, many basic sewing machines now have some degree of computers in them even low end machines, and then there are the high-end machines like embroidery machines or my new-to-me Bernina "Sewing Computer". Are there reasons why you want a non-computerized machine in particular?
I'm a big fan of vintage machines myself, or at least "post war metal Japanese machines" and sewed on one older than me for most of the last 30 years until my friend gave me the Bernina mentioned about a year ago. Zero computer there, it did have zig zag and weighs about as much as a boat anchor. Still working, lovely strong straight stitch and can sew through anything including leather and upholstery, much less a quilt. I can do the maintenance myself, it isn't fussy about thread or needles or much of anything. My particular model was Remington and belonged to a friend of mine's grandmother before me, Morse are similar and there are any number of very good solid machines out there.
A lot of us here on the boards are fans of inexpensive Brother machines to take to classes or to use full time. I have a Brother 2230 that I bought at the thrift store for around $20, it doesn't wind bobbins well (maybe why it ended up at the thrift store) and so I bought a portable bobbin winder for another $20. It does everything I need to quilt and then some. We have a current thread here discussing Brothers:
Recommendations for Brother (or Babylock?) machine for classes