I think it is a fair and decent question.
Don't really have the answer other than its the old adage of supply and demand.
You build a
MH, you then sell a dream for as much as you can possibly get away with. result is the british punter does his normal and pays well over the top compared to his european cousins.
HOWEVER- there is a catch, the ammount they charge is dictated too by the market. The market is shrinking massively due to the current fat cat crisis. With a shrinking market comes a battle to sell hence lower prices.
Of course thats only good if you dont have a px.
The only other thing I would say, is having seen the quality of some of the Yank vans against the Euros, Im amazed at the difference. Im sure Yanks have there probs too but surely not to the extnt you read about on euro vans.