I just checked current exchange rates and discovered that I've only bought maybe 5 books that cost more than £10. Now that I've left the Amazon for Kindle, most ebooks I buy are a little dearer, but I have yet to start buying non-fiction on my Kobo. Kobo's prices for NON-fiction are insane in their NZ store - I have yet to come across any I would want to read that cost as little as the equivalent of £10, most are 2.5 times that much and up.