If you're looking to shop for some Japanese / Anime goods, you should seriously consider Tokyo Otaku Mode. They're selling everything related to Japanese anime, manga, games, music and fashion and their prices cater to any budget, ranging from just $0.99 to over a hundred dollar.
Now, as for that $10 discount you can get. It's pretty simple:
And that's it! Don't forget to take advantage of the free shipping promo (lasts 'til January 1st)