I am not a sewing machine expert but that is a lovely cabinet. I would not be adverse to spend $100 on the cabinet but that is me. Have you tried out the machine? I would see if the bobbin/shuttle is there, is the tension spring/disc there and in working order? Does it take a regular needle or will you need to special order them? Extra bobbins and are they hard to find?
Hopefully some of our experts can tell you about the machine itself.