I bought a 15-91 last spring at a yard sale for 35$ in a cabinet, I found a manual for 7$ on line and attachments for 35$ and then was given some attachments by a friend so I sold my doubles. I bought a walking foot for it and a new throat plate with the 1/4 inch mark on it. Not expensive at all. I love the way it sews, My wiring needs to be redone which I will do shortly not a hard job to tackle. With the manual it shows you how to do everything including taking the tension apart and and putting it back together. A manual for me was a must and should be for you to that way you will get the best out of your machine. Good Luck and I think that you will like it. Just an after thought I have an expensive BabyLock/ Embroidery/Sewing machine and I truly have to say the stitching on the 15 is better and my babylock has a had time going through multiple layers of fabric and some times doesn't at all but the trusty old 15 makes short work of it.