My experience differs. Perhaps the reason is that the scientific textbooks that I love to buy are often "long-tail business", i.e. textbooks about very special

My experience differs. Perhaps the reason is that the scientific textbooks that I love to buy are often "long-tail business", i.e. textbooks about very specialized topics. The situation is even more biased towards Amazon if we are talking about used obscure textbooks in good condition for a fair price.