If you combine the SE with the local used market, it can get extremely inexpensive. I'm currently rocking an SEv2 that I got for $150.
I'm not saying that $150 is cheap objectively, but in relation to Android phones - even used ones - it stands up pretty well.
This is especially true since Apple supports phones for so long. If you're cost constrained, you can spread the cost of a phone over more years than a typical Android phone.