Thinking of a 09 to 11 second hand car/estate. Just really tying to understand the anomaly - Parkers is the source of the information: According to that site the Nav version is £435 cheaper. It seems to be exactly the same car and, as I say, I would have thought the Nav would be the more expensive. As I'm sure you can imagine, a difference might be something significant the I can't identify. Certainly, when I check the equipment levels in Parkers and features, the cars are identical.