I believe he means Xbox Live Gift Cards. Currency. Used to be MS Points. That's a killer deal by the way.
Jeff, here's the link I used: http://www.bestbuy.com/site/microsoft-15-xbox-gift-cards-3-pack-5-green/8443052.p?ref=199&loc=Es5Ekr9eEBk&acampID=1&siteID=Es5Ekr9eEBk-GEEcLmcIPo6xR9lpN_B9EA