mugglenet.com is an excellent one.
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.
Some good sites for Harry Potter news and entertainment are fansites like Mugglenet and Leaky Cauldron. The best site overall for Harry Potter is Pottermore, an official Harry Potter experience. It opens to all in October.
A Google search will show up quite a few. Specific sites include the Wikipedia, which has several detailed articles about Harry Potter, and the Harry Potter Lexicon.
Ebay certainly has very high variety of Harry Potter merchandise. However, there are a number of different sites that have Harry Potter items for cheaper. Check sites like craigslist, or ask around on social networking sites like facebook.
There are thousands of Harry Potter sites out there not all of them offical ones. So somewhere they will be a new HP chat site.
any online store try search phraseadult harry potter pjat commonly used shopping sites and storesebaybingshop.comwalmarttargetany other mall or store near you
One can find information about Harry Potter Spells on the Internet. Sites like HarryPotterWikia and FunTrivia tells you all sorts of information on all the spells used in Harry Potter.
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The website below is fairly good for Harry Potter information:http://www.mugglenet.com/(If you've got another website, please add it).
It is illegal to stream the Harry Potter movies from sites like movie2k.com. All of the movies have now been released on DVD.
Ebay or amazon sell Harry Potter stuff there is a lot on theose websites: www.eBay.com or if you are from the UK go on www.eBay.co.UK www.amazon.com