Online pricing mistakes happen. When they do, the retailer isn’t obligated to sell the item to you at the original price. Life and retail just are not fair. However, what companies are not supposed to do is cancel your order at an erroneous sale price, then put it through again at the much-higher original price that you didn’t want to pay. That’s what happened to John’s brother and some other posters on the sale forum Slickdeals.