Your observation is consistent with the parent comment. The article says, "accuracy of people’s guesses sharply decreased from the 1970s to the 2000s". Presumab

Your observation is consistent with the parent comment. The article says, "accuracy of people’s guesses sharply decreased from the 1970s to the 2000s". Presumably by the 1990s, stores had already begun to sell well below the MSRP.