Today, The Boy Who Lived turns 38. (And now we feel old — anyone got some Elixir of Life handy?) In celebration, ThinkGeek Diffindos up to 80% off a selection of Harry Potter items during its Harry Potter Birthday Sale. Shipping adds $8.95 ('round about 1 Galleon, 5 Sickles, and a fistful of Knuts for you wizards), although orders of $75 or more magically qualify for free shipping. (Pickup at ThinkGeek or GameStop stores is also available, but it costs $7.95. Wizards are also welcome to Accio their orders.) Shop for apparel, decor, kitchen items, toys, and other magical memorabilia.