A couple of years ago I got fed up with replacing phones because the battery wouldn’t hold a charge, so I bought a new-in-box, then-six-year-old LG V20. It has some problems, chiefly bizarrely poor reception, but by God it has a removable battery and a headphone jack! I was going to replace it with the Fairphone when that came to the USA but when I saw how expensive the Fairphone was, I decided to stick with the V20.
(The funny thing is that by the time I need to replace the battery, I probably won’t be able to buy one anymore.)