you should check it out- see what kind of shape the machine is in- has it been taken care of? the wiring good? does it have a belt? if so- is it in good shape-not cracked/worn? the foot pedal/ cord in good shape? does it sew a nice even stitch? any attachments with it? how about a manual?
what kind of shape is the cabinet in? sturdy? hinges good? machine shelf secure/strong?
if it passes inspection & you like it- it is probably a good deal-