When you buy a book, you will find that the price of the book is very expensive. When you use it up, you will find that the book is still new, but it is only worth one or two yuan. The gap between them is not generally large. I spent 80 yuan on a book when I was in the third year of high school, and finally I only sold it for 5 yuan. This gap is obvious enough. This is still recycling. If I sell waste paper directly, it's estimated to be worth a few cents.
I spent more than 300 yuan on books every semester in college. It was better when I first entered freshman year. Hand in the books together before the start of each semester, and then there will be no problem of making up the books. After each semester, it's probably around 300 yuan. I have bought it almost every semester since my sophomore year. In my junior year, I paid 300 yuan at the beginning of the semester and asked us to make up 300 yuan at the end of the semester. This book is very expensive.
The quotation given by the school is directly quoted at the back of the book. Is this the price you paid when you bought the book? The answer is impossible. After four years, it cost about 4000 to buy books. At the beginning of school, I sold the books I didn't use in the last school year. Fifty or sixty yuan a year later, only four years of books in 200 yuan.
Selling books is definitely not as good as buying books. I spent 4,000 pounds on books, but only 200 pounds. Only I can understand this gap. All my high school books were sold as waste paper, and finally sold for more than 30 yuan. There are many more books in three years of high school than in four years of college. I think the price of my book should be the highest.