Def Leppard have sold over 100k in the US Alone in just over 4 weeks and selling 8000k a week right about now of the new CD.
They were also just added into Rotation on VH1, so that should increase sales as well.
List of sales certification thresholds
CANADA
Gold Platinum Diamond
Albums - 50,000 100,000 1,000,000
Singles - 5,000 10,000 100,000
DVDs - 5,000 10,000 100,000
Digital Music- 10,000 20,000 200,000
UNITED STATES
Albums and Singles - 500,000 1,000,000 10,000,000
Music Videos - 50,000 100,000 1,000,000
Digital Music - 500,000 1,000,000
Multi-disc albums are counted once for each disc within the album if it is over 100 minutes in length. For example, each copy of OutKast's Speakerboxxx/The Love Below (running time of 134:56), Tupac Shakur's All Eyez On Me (132:18), and Shania Twain's Up! (145:44), all three double albums, were counted twice, meaning each album was certified diamond after only 5 million copies were shipped.
List of international sales certification thresholds
http://en.wikipedia.org/wiki/Music_reco ... tification