My understanding is that in some cases, Amazon will blend together FBO items in their warehouse, mixing the stock that Amazon sells with the stock that other ve

My understanding is that in some cases, Amazon will blend together FBO items in their warehouse, mixing the stock that Amazon sells with the stock that other vendors send it to be sold. They're assuming that for a new book, the items are fungible, so it doesn't matter. This breaks when scammers print lower-quality counterfeit copies that appear identical at first glance. You order "Sold by Amazon.com", but when they grab one off of the shelf, you get the copy that "123Books" added there.