I have a 158.523, purchased in 1966. Made clothes for 3 kids, alternations, some clothes for me, mending, etc.
It has travelled from central California to southern California to Alabama and back to central California.
I have made 50+ quilts on it in the last 5+ years and like they say - it is a workhorse. Love it. Oh and for maintenance, I think I have spent approx. $200 in all that time.