How many copies did the black album sell?

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Tags

1. #fewer
2. #things
3. #began
4. #about
5. #album
6. #million
7. #sales
8. #since
9. #never
10. #copies
11. #tracking
12. #selling
13. #release
14. #music
15. #states
16. #metallica
17. #probably
18. #united
19. #black
20. #nielsen