Well, I am still using the first machine I ever actually owned -- my husband bought it for Christmas the first year after we married (1963), so I've got 50+ years on her -- a Singer 328K, and I still use it a lot, still sews great so I'm happy with her. I also have my Featherweight which I haven't had very long -- 2-3 years I would guess. I also have several Singer 751's (which I don't use regularly) and I have my mother's Singer 1425 (also which I don't use much).
Jeanette Frantz