Thanks for the explanation of the 3G surcharge. I've taken screen shots of two reasonably popular books.
That's not really what I meant, it just so happens that I was having a look at Amazon's prices again recently because of the new Paperwhite. I only know that prices are higher now than I remember them to be in general, can't say how long they've been like this. I don't remember any exact prices but it used to be that Amazon was quite consistently better on pricing.
I should say that not all books on Amazon are more expensive, but it seems that most of the more popular ones are. Of the few I've seen that are cheaper, I've noticed that none have the 'This price was set by the publisher' message.