When I was in school I'd sell my unwanted books not to the bookstore for 1/30 what I paid, but to a student in the next session of the same class for 80%-90% of

When I was in school I'd sell my unwanted books not to the bookstore for 1/30 what I paid, but to a student in the next session of the same class for 80%-90% of what I paid. I advise others do the same whenever possible as it dramatically reduces the average price paid. Version churn can work to your advantage. Recently I bought a couple of previous-edition textbooks on subjects I was interested in. In both cases the newest edition was over $100 and the previous edition less than $10. The differences between editions are negligible. Despite this, I realized reviewing these books that the reason I don't normally do this is that textbooks are almost universally of utterly abysmal quality and riddled with errors, superstitions, and nonsense compared to the state of the art knowledge in any field. For-pay college and textbooks are a waste of time and money. Stealing textbooks is pointless and futile as you are doing something illegal, but for taking something of no real value. Speaking here as a sometimes college lecturer and teacher.