I have an old Kenmore Ultra Stitch 6 and you just can't kill the machine. I cleaned and oiled it when I got it. I use it everyday. If you only paid $7 for it, it would be worth it to have it checked and tuned. I did have a new tension dial put on mine about 8 years ago. Today, after cleaning and adjusting 2 FW's I would probably have done the tension dial myself. Very basic and simple machines. You also can take it to a vac & sew shop that repairs sewing machines. Good luck