I would look for a vintage Singer. There are numerous Singers out there that are wonderful for piecing and quilting.
List of Singers to keep a watch for on CLs: 301, 15-90 or 15-91( nice for free motion quilting),401, and the Feather weight. These machines are all metal and built to last, easy to repair and clean yourself, sew beautifully, and have a large throat space for quilting. I have made many quilts on numerous vintage Singer machines: 15-90, 15-91, 66-1, and the 201.
You can find them on CLs for around a $100 and under.