` ` Avatar '' ( 1 million units ) taking top ( dis ? ) honors . It 's only right . ` ` The Dark Knight '' tied for second place with ` ` Transformers '' Still , there is surprisingly little overlap between the two .
` ` Avatar '' ( 1 million units ) taking top ( dis ? ) honors . ` ` The Dark Knight '' tied for second place with ` ` Transformers '' Still , there is surprisingly little overlap between the two .