Well, basically it's totally based on your needs for what purpose you want to buy iphone. There nothing perfect in this market so every product have pro and cons if you are planing a phone for longer period then you can go to it because any new android phone company gives only 2 to max 3 years of android update support but in iphone you will get 5-6 years of support.
Used iphone will give you the same performance as like new and you will not get any compliant from camera also and if you don't like the phone you can easily sell that without any problem.
<img style="width: 400px; height: 300px;" src="https://api.letsdiskuss.com/resources/static/asset/uploads/1650963719430-bestiphone_stuff_new_3.png" alt="Letsdiskuss" width="360" height="270" />

Also read:- <a href="where-can-i-get-an-iphone-cover-in-india" target="_blank" >Where can I get an iPhone cover in India?</a>

What are the benefits of buying a used iPhone?