As a consumer, and also as a seller, I figure that compromise is an inherent part of a transaction. How can I make this unscrupulous fuck ship the item according to a very reasonable and current rate, rather than let him make money on me? Basically, it's unreasonable to pay a seller an inflated shipping rate for something they know they aren't going to make a decent amount of money on.
You made a deal and now you want to renegotiate it. That is not compromise and that is not scrupulous behavior on your part.