Nobody is forcing you to spend that kind of money on the box, if you don't want to. Just like nobody is forcing you to buy VIP tickets. Think of it this way - this is for the hardest of the hardcore fans. The ones who wants to give back to the band. If you don't have the cash or don't feel that it's worth it, nobody will look down at you for not getting it, and there are several options which do not require you to pay that amount of cash.
UK has a VAT if i'm not mistaken. That alone adds 20% to the US salesprise REGARDLESS. If you buy it directly from the US, you will still have to pay those 20% in import taxes...