A lot of this is because of 3rd-party sellers. To make things easier, I usually filter by "ships from and sold by Amazon". Some of the pricing and "styles" for

A lot of this is because of 3rd-party sellers. To make things easier, I usually filter by "ships from and sold by Amazon". Some of the pricing and "styles" for 3rd parties are ridiculous because they're algorithm-driven. That's likely why the $9.99/oz price happened. https://www.fastcompany.com/3060803/algorithmic-pricing-is-creating-an-arms-race-on-amazons-marketplace https://www.fastcompany.com/3060803/algorithmic-pricing-is-c... has some context on why and http://www.michaeleisen.org/blog/?p=358 http://www.michaeleisen.org/blog/?p=358 talks about how . TL;DR Amazon picks (using their secret algos, ofc) which selection should be the default among the sellers. Everyone wants to be that to get more sales. Sellers then fix the price to a different item which has the price sometimes fixed to that other item, or potentially a loop with more products involved. They then proceed to algorithmically price each other far beyond normal costs for the item.