Comment by ikeboy

I link to it every single thread like this, but here goes:

https://sellercentral.amazon.com/gp/help/external/200141480?...

"For inventory tracked with the manufacturer barcode, each seller’s sourced inventory of the same ASIN is stored separately in our fulfillment centers. We can also track the original seller of each unit."

Previous discussions: https://news.ycombinator.com/item?id=20549623, https://news.ycombinator.com/item?id=13952939, https://news.ycombinator.com/item?id=12062856

This is the biggest misconception about Amazon I've seen, and has been for years, at least on HN.