I wanted to ask, are the second hand items brought from Hindus to be considered pure? I am not talking about food, just normal objects like I have second handed books, table and pc so are they to be considered najis or tahir?

What about if they had touched it wet hands to clean it, I mean they are likely to clean these thing?

1) If you haven’t seen any najasah on those objects then they would considered tahir

2) Unless you are certain that they used wet hands, it remains tahir.