They're retailing here for around £270.00 that's around $480.00, so there's plenty of resellers importing from the US to sell cheaply (I know because I just returned one)

That doesn't make a lot of sense. Rio don't charge their UK distributors and retailers any more than their US customers. US outlets just seem to be more competitive. I suppose the exchange rate might make it tempting to import stock, but I can't imagine it is cheaper to buy from a US retailer than direct from Rio in the UK.

Our UK SKU's use cardboard packaging and come with an appropriate AC adapter (with interchangeable heads I think).

Rob