S21 Ultra in 2025

It might be possible for me to get hands on an S21 Ultra sealed pack for approx 320 usd (29k inr). You think this is a good deal? And does it makes sense spending this on a phone which effectively does not have any OS updates coming? I have always wanted to get an Ultra but never got around to doing it, and this might be an opportunity. I'm checking if I can get a similar deal for s22 ultra, but it seems unlikely.

Let me know your thoughts please.