Just picked one of these up today (Monday) brand new in box from the Leeds Asda Living (Crown Point) There is a chance they might still have some. They were selling the 730 (Europe) and 530 (UK) over the weekend for the same price of £150! but I narrowly missed out on the 730 as they sold out minutes before. Can't be a bad price although it looks like this model is disappearing from most retailers now.
Tried the Bradford Adsa Living but no stock on display. Also tried the Wakefield main ASDA but they don't even seem to do sat navs so it looks like just Leeds Living clearing stock.