there is a law pretty much againt with holding a domain from a company who can prove they need/warrant it more than you do or selling it to them for too high a price
e.g.
you buy
www.coke.co.uk and hold it
Mr coke wants it and ask's to buy it
you say, £1,000,000 please
they take you to court and prove you dont need it or have anything to do with coke
they make you sell it for a reasonable price to them.
always nice i think
there must be away around it, making a product to suit may do it.