Classically, you're right, but Amazon seems to operate by a different set of rules. Prices, availability, and recommendations change constantly according to som

Classically, you're right, but Amazon seems to operate by a different set of rules. Prices, availability, and recommendations change constantly according to some internal algorithm. In effect, no two users are shopping in the same store. This disrupts the ability for users to communicate about what's going on at Amazon. The whole thing is a big mystery and most people just see what they think is a good deal and snap it up before it's gone.