@levisan only to the degree that it is not a function of monopoly/cartel. If that were true, inkjet ink, paper, light bulbs, and vinyl records would be shipping cost only.
To the degree that you can't roll your own and must buy it from an industrial concern, it will always have an associated cost.
On the other hand, at the end of the season when your neighbor has nowhere else to store and can use no further tomatoes, they come free by the pound: there's no cartel or monopoly on their distribution or production.
@levisan i buy Christmas lights and gift paper on Dec 26/27, and usually, pascha is after the western date for easter, so I'm used to getting candy and whatnot at a discount, too. :-)