Well I fix em up and sell them so I can have a ton of them hanging around, as far as the old Singers go I think I personally have kept one of each but I mainly quilt on my 15-91 and my 31-15. I do have a Necchi BU but I have never sewn on it. The only Singer I really have a hard time sewing on is the FW, my arm is fat (woman of substance) and I burn myself repeatedly on the dang light. I have a class set up in the basement with machines and I have a sewing room off my living room upstairs and I have a machine set up in the bedroom just in case... I have a sickness I know...