You can only buy them in America. The American Amazon sells them.
Yes. You can purchase the Harry Potter and the Philosopher's Stone Ultimate Edition DVD from shops and online retailers such as Amazon.
Vancouver
The wizards in Harry Potter bought the majority of their things from the shops in Diagon Alley.
http://harrypotter.wbshop.com/ If you Google "Harry Potter shops" or "Harry Potter clothes/whatever" then results will come up with different sites, like that.
Diagon Alley.
There is no such thing as a 'Harry Potter Store'. The only thing close to it are the ones at the Wizarding World of Harry Potter in Orlando and the shop on the Warner Brothers site.
Check online.There are alot of online t-shirt shops that carry vintage t's and such.
No, but in Orlando, Florida there are alot of shops in Universal Studios.
Madame Malkin's is one of the shops in Diagon alley.
Lego and Harry Potter is sure to be a winner for any child at Christmas. Lego Harry Potter sets are available from a wide range of retailers both online and in physical shops, for example Amazon or Toys"R"Us, in addition you can buy Harry Potter sets direct from the manufacturer.
About £15.
I suggest going to the library, or Chapters to find the tapes.