1000 copies have been sold
510,000 copies
40 Million Copies
320,000 copies sold as of now
For each book over 1 million copies have been sold.
Too many.
Over 500,000 copies of Nightmare have been sold as of 2011.
Over 1 million copies of White Fang have been sold worldwide.
Over 3 million copies of Tracy Beaker books have been sold in the UK.
When the 13th volume of Kuroshitsuji was released, the manga had sold over 10 million copies in Japan alone. There have been no number counts released to factor in how many copies have been sold since, or how many have been sold in other countries.
Many copies, due to numerous reprints its partically difficult to calculate
100 thousand copies