My apologies.

I was using the prices on their UK site and doing the currency conversion with the current currency daily conversion. Their UK site lists at 144.95 pounds. That currently converts to $270.00 dollars in US. And the other price 174.00 pounds converts to $320.00.
My mistake , I was actully converting in todays dollars. If they hold true to their US pricing you are completely correct. They are much cheaper. Please excuse my honest attempt at an explanation.