is the iphone xs still worth it

is the iphone xs (64gb and 78 battery capacity) still worth it? how long would it last if i use it as my main? my main phone (samsung a53) has battery issues and the volume button is missing so i have to use an iphone xs since i cant buy a new one rn. i have to wait for 2-3 years before a brand new phone. my options are:

1. use the iphone xs (is it possible to use it for 3 years?)

2. if the iphone xs would not last for 3 years, get either of the phones repaired

3. sell both phones and buy a new one (how much would i sell the 2 phones? im thinking 10k)

any tips?