That person would likely be left out of pocket from court costs. As I understand it, it's fairly common practice these days to do it this way, or even at point of accepting the delivery. I think this and the 'errors and omissions excepted' clauses became common place following a spate of companies being sued for accidental pricing errors, it gives the reseller a modicum of protection.
Here's an extract from the T&C of the largest reseller in the world:
Consumer law exists to protect the consumer from risk, when there is no risk to the consumer there's no question of 'fairness'. Unfortunately, commercial sale is subject to no such protection. We deal with risk every day and the terms & conditions that we have to abide by vary from one supplier to the next and are legally binding before an order even takes place. For example, for one major supplier, purchase orders are non-cancellable, price can be subject to change and delivery can occur any time in the next twelve months. So we are locked in to buying what we asked for even if the price increases from what we were originally quoted.
eeerrrrrrr....who?
Matt is such a boring name, I'm definitely never calling a child Matt
(and there I go offending over a million men in an instant)