Hi,
There's discount offered for Harry Potter and Philosopher Stone (Sorcerer Stone) audiobook read by Stephen Fry /etc. in Pottermore
The discounts ,as far as I checked, is applicable to UK/US (Dale)/DK version.
They have discounts for ebooks too.
http://shop.pottermore.com/en_GB/books/HP1?c=USD
Just bought my copy.Wish Deathly Hallows have discount , but still it's nice
And lots of thanks
for you guys for having this page,I have been lurking for the past few months