Next cheapest I can see is Dixons.
Dixons - £203.07
* Award-winning, thinnest-ever, stylish and blade-like sat nav
* Bursting with all-new navigation features plus multi-touch screen and dual-orientation display
* Lane Assist with PhotoReal™ Junction View illustrates lane selection with accurate signage and landscape detail
* NüRoute™ technology with trafficTrends™ and myTrends™ predicts your regular journeys and learns historic traffic patterns
* Essential navigation features: subscription-free lifetime pan-European traffic, Bluetooth® hands-free calling and Cyclops™ speed cameras