I think photocopying books have certain purchase value, but it depends on the situation. Photocopying is usually cheaper than the original and suitable for people with limited budget. At the same time, photocopies can give us access to precious ancient books and out-of-print books, which is very valuable for academic research or enthusiasts. However, we should pay attention to copyright issues, and the quality of printing and paper may not be as good as the original. Before buying, you need to carefully compare the quality and price of different versions to understand the copyright situation. If you are concerned about the quality and copyright of books, or need to read professional academic works, it is recommended to buy the original.