An older, once premium model can be a good middle ground. I usually buy used and had a Note4 for several years, then my SO used it, then I used it again, then we resold it in working condition. It also had a swappable battery and card slot. Both likely helped extend its life.
How are they not usable? I use a Nokia 7.2 and I think it's a perfect phone. Good screen. Pure Android. Fast. Nice camera (though I really don't care about this). It has 64GB of internal storage, but adding an SD card was straightforward.