I bought this game Fallout 2 sometime back in the 1990s, but never got around to opening it or playing it. So it's still in the original shrink-wrap.

Any idea how much something like this would be worth? I have no idea.

Probably not much I'm afraid. Brand new copies are going on Amazon for under £5.

put it away for 50 years or so maybe then...

I hope its personal value is greater than its financial value. It will look nice on the shelf, I think.

Oh the value is much higher than of a new copy.
Original box and stuff, might be worth quite something to some particular fan.
But you're not going to get rich selling it anyway.

My guess would be up to $100 on ebay, but it's a strange world so who knows.