Don't think that a sewing machine will be automatically better because it's new. The ones made in the sixties and seventies are metal and sturdy. You can still get parts for Singer models that are over 50 years old. My machine is a 1961 Singer (older than I am) and it runs like a dream.
I'm not telling you to avoid new ones, just be sure of the quality of any machine you get. DD bought a new White brand machine two years ago, and I really like hers, too. She has a really cool function for doing hems. We do lots of apparel sewing, so we appreciate the bells and whistles.
Someday, I will have a serger.