Make a checklist of functions she wants then compare various machines for these functions. Go sew on the top two to see which one you like better. It is important even for a novice to sew on them to see if one is easier to learn and work. A machine that is easy to use will make some one more likely to sew and enjoy. The quality of the machine does make a difference. The dealers will gladly let you try them. Once you decide, shop around. If you can find a gently used one, go for it!