Most of the &quot;oldbiz&quot; buy the goods and sell them from their own corporation -- this is because they have actual retail stores. Amazon does not.
I do not know how much their rake is for 3rd party online goods though -- I see &quot;Sold by Pharmapacks&quot;, etc.. often on Walmart and the price is usually not competitive at all compared to &quot;Sold by Walmart.com&quot; items. Mostly has to do with the shipping price.