I ordered something from Amazon, with Amazon as the seller, and with the Prime filter checked.  It was marked as having low remaining inventory.  After I purchased, and the item failed to arrive with the rest of my order, I saw that it had been moved to a separate order, from a different seller, with an additional $10 shipping charge and an additional week of delay.<p>Look, Amazon, you have a real problem with sorting and filtering.  What I really want is a way to order goods by the final, bottom-line price, including all taxes and shipping costs.  If something costs $20 plus $10 in shipping, it should rank after a similar thing that is $25 plus $0 shipping.<p>The Prime filter is the only way I can even approach that problem from my end.  It forces the cost of shipping to be included in the price of all items, at the expense of not seeing potentially cheaper items.  But even then, Amazon can&#x27;t even manage to sort correctly by price.  Nor does it handle quantities in a package very well.