Amazon's Market Place

A big important ingredient in amazon success has been its market place, which is a totally decentralized and that anyone can sell on it. So you have tons of manufactures in china, for le who used to have to go through american or european or whatever, retailers, now they go direct to the customer through the amazon market place. And depending on how thick the like number the market is for a particular item, like batteries, let's say, or specialize, and 's only a few sellers, we don't notice this, but the price of those items can fluctuate quite a bit.