For me, it would be at least 128 GB (minimum) storage. We were really balling with 16 GB iphones even less than 10 years ago lol.
So my rommmate/best friend has been using an iphone 6 for the last 9 years. 16 GB at that. Just constantly deleting shit all the time or dealing with apps that don't necessarily work anymore properly.
For him, it really just worked so he never bothered to upgrade.
Well, the universe finally intervened today when he visited me at the bar i worked at and later left his phone on the roof and it went flying (we live literally across the street so he was fine to drive) and someone ran over it. The phone surprisingly still works albeit completely bonkers screen but after convincing him to treat himself and move to the actual new age, we went to the apple store.
Homie JUST got an iphone 15 Pro Max today (he got something better than me) and immediately he was caught off guard with the lack of Touch ID and the gestures.
You are lucky. I have never been able to find one that cheap