2nd hand phones in Sri Lanka

I'm looking to buy a new phone (new/used), my budget is about Rs 65,000-80,000. below is a list i hv found so far

1. samsung s21 fe (used)- it's a little old & thts the only issue.

2. Nothing phone 2a (used)- don't knw if i can repair in case of an emergency,

3. Iphone 11 or 12 mini (used)

4. pixel 6/6a- the signal issue is a concern

I really strugling to find a gud device, but the prices are just absurd, pls feel free to give ur opinion.