Pirated books are cheap, there is no copyright fee, and of course there may not be much tax. The price of paper and labor is much lower, and the general cost is 1 to 25 cents per copy. In fact, the cost of genuine books is similar except copyright fees. If you don't indicate the print run, you can divide the number of pages by the number of folio (that is, how big the book is, for example, 32 folio and 64 folio). If the 320-page book is 16 format, then it is 20 books, and the general price is above 20 yuan. The best seller may be printed in 2 yuan, which is more than 40 yuan. Pirated books sell for 5- 10 yuan (of course, he won't bid this price). The cost is around 3 yuan, and it will be sold above 5 yuan anyway.