I am borderline insane and in the FC but also post here so I guess I'm a rare exception to the rule
EDIT: FWIW I don't think I'll be buying the $450 box set though. No extra music or video content!
Even if there was extra music or video, there would have to be a lot of it to shell out 450 quid!
No interest in having a box full of knick knacks that I will never look at, and content that is already in the "cheap" box.
I might have considered it if I hadn't already forked out €300 on all the other formats. If they shift 2000 copies of that I will be very surprised, TBH I would be surprised if they shift 200 copies, the only item of any unique value is the bluray, and I would value that content at €10 max