I worked on a help desk at a dot com retail site many years ago and someone accidentally listed the entire boxset of Friends Dvds at the price of a single season (about a £150 difference!). Overnight thousands of orders came in and the next day I had to cancel the orders, let people know that there had been a mistake and advice people that the listed price was an invitation to buy and as long as they were told before the item was shipped and charged that we could with draw it.
I've never been called a word removed quite as often as I did that day, which, as Bananrama would say, is really saying something