If you’re talking to me.....I wouldn’t recommend ANY used sewing machine of the newer type. You’re a tech. You know how people (techs and users both) jack around with machines.
And I don’t know anything about Pfaffs or other brands, just the Singer 5400. I would buy a brand new Singer 5400, if I were you. Disclaimer: We’ve only had our Singer 5400 since May of 2014, so I have no long-term information on its longevity.
CD in Oklahoma