Ultimately the difference will be quite nuanced for each individual user. However, if Amazon is able to figure out what the user purchased (whether it's directl

Ultimately the difference will be quite nuanced for each individual user. However, if Amazon is able to figure out what the user purchased (whether it's directly provided during checkout, or they're able to identify it by looking at the charge and comparing it to your publicly available inventory online), it would be quiet easy for Amazon to say "Hey, you just purchased X for $100, we have it for $80"