You do know that Amazon does that right? Some sellers offer free shipping, but their price reflects the added shipping. Before you say 'I meant UPS charging on

You do know that Amazon does that right? Some sellers offer free shipping, but their price reflects the added shipping. Before you say 'I meant UPS charging one price to one manufacturer, and another to another', then UPS does that too. You can be very certain that UPS charges Amazon much lower shipping fee (due to the bulk business) than an independent seller on Amazon. Vendors have been charging different fees to different businesses since forever, and we never had a problem mostly because nobody ever finds it more profitable to charge for printing Bible more than printing Sears catalog just because they don't like Bible.