That doesn't explain why you still have 3 sealed copies of the same steelbook. Especially one that is worth so much. I know I keep going on about it, but I can't wrap my head around it. Honestly if I ever find myself in a position where I have 2 identical copies of a steelbook due to getting a no return refund on a damaged one or something I immediately sell it so that I can buy more steelbooks. Unless you have a massive excess of cash and it just doesn't matter to you. But how many of those 400 steelbooks are duplicates that you could just sell for what seems to be like a lot of money. Those Lost in Translation steels are getting incredibly rare to find an unopened one. Unless you are just waiting for it to appreciate in value so much you can clear £200 each for them.
I have 400 unique titles and maybe 700 steelbooks counting duplicates. I have sold some over the years. I do intend to sell off duplicates and sell off my least favourite versions where I have multiple different steelbooks for the same film (like Lord of the Rings, Marvel, Indiana Jones, Gladiator and a load more).
I haven't done it because I have moved several times since I started collecting so many of my belongings are yet to be unpacked including all of my steelbooks, my goal is to settle in a home.. unpack my steelbooks (and everything else sitting boxes) and put them on some nice shelving.. at this point I'll go through the collection and sell what I don't want. At the moment they're only increasing in value so I'm in no hurry