Also realize there is more behind the scenes in regards to pricing than we as a buyer see.
Case in point: Amazon has regional facilities all over the US, GREAT for buyers as we get fast shipping. Not so great for sellers. If a product gets stocked at a facility in your state the seller is now on the hook for ALL SALES TAX if there is any in your state. So a seller in
Ohio lists on Amazon, Amazon stocks it here in WA and ships to me (in WA) from that facility, well Amazon now reports sale to WA state. Then the seller gets a letter with Sales tax due for the sale. A seller I know just got slapped like this with a HUGE tax bill from over a years worth of sales that he did no realize were due sales tax, talking many thousands of dollars.
Plus Amazon's listing and % fees and shipping charges. It just all adds up.