vikinger:
These prints have the basic value of a £5 piece of paper with ink applied, but their attractiveness, uniqueness and the name of the artist etc gives them a value that demands a payment of thousands, something some people are apparently only too happy to pay.
It's all to do with availability. Even prints of famous work are given limited runs. For example, 350 prints of a particular work and, once they are sold, getting hold of one of these 350 prints can be nigh-on impossible. The demand then pushes up the price of the print and so on.
If B&O started limiting the number of manufactured products, it might work. For example, release only 1000 Beosound 8 units, each with its own number and, once they get to 1000, you can't get it anymore! That makes it a "work of art" as it becomes limited, demand rises and, human nature dictates that we all want stuff we can't get any more. The rarity makes something more interesting.
Which is why a lot of B&O enthusiasts still prefer the rare harder-to-find vintage kit.