Tim goes on to relate that one of the ebooks in the series is on sale for $0.99, an offer which he didn't get (due to regional restrictions, possibly). He also notes that he sees 2 prices for the last ebook in the series, with the higher one only visible when he is logged in.
I don't think Tim's issue is the same one I encountered at Kobo, and I am not alone in this. A number of people have commented on Tim's original blog post and reached the exact same explanation I am about to provide.
Tim posted a couple screen shots which showed the 2 prices. I want you to take a moment and read them. If you know something about the global ebook market the cause of this price disparity is pretty obvious:
Do you see where the more expensive ebook mentions international delivery and says that the price was set by the publisher?
That's because the cheaper price is the US price, the one where HarperCollins has to allow Amazon to discount the price of the ebook. That is a result of the anti-trust settlement. Guess what? That settlement does not extend beyond US borders, and that is why HC can still control the price of the ebook in Canada.
While I'm sure there could be other reasons for the price difference (and probably are), this pricing situation doesn't seem to be the result of evil Amazon so much as it is the result of a stupid publisher.
Now, I do agree that Tim should not have been shown the lower price, but it seems that when he's not logged in Amazon isn't tracking him. This differs from Kobo, where I know for a fact that they accurately identified my IP address when I was not logged in.
In fact, I just duplicated Tim's original complaint. I am betting that his current location is in the US, only his Amazon account is set to his home address in Canada. Amazon may have correctly showed him the US price based on his IP address before he was logged in and also correctly showed him the CAN price after he was logged in.
The thing is, Amazon shows you the price based on what country you tell them you are in. If you want to see what an ebook costs in Canada, change your country and find out. You'll need to provide an address, but that is easy to find.
All in all, this is a non-story.