Not sure if these would be unexpectedly high values as most people know they fetch a little bit, but I have all my old N64 games still boxed with most of the original inserts too. The one I know most would be Conkers Bad Fur Day, that always seems to fetch a nice price.
A couple of my Funko Pop figures are possibly worth a few hundred but nothing more.
And I have the full set of Hobbit and Lord of the Rings Lego sets which I know go for a bit over the original price.
It’s on my wish list but I have so many other large (read £200+) sets I need to get before they retire. So this may wait.
I do appreciate that they have designed it so you can build two different versions.