My father is always looking for ways to save money, however he has never been particularly good with his money. This means that he just assumes that what people tell him is a good deal actually is one. If you know anything about sales people, then you know that this is not always the truth. Sometimes a deal that looks good is a really bad deal.
When one of his fishing buddies told him that bulk motor oil would save him money, he automatically just went out looking for a large amount of oil without regard to price. It took several seasons before he realized that he ought to be comparing bulk oil prices and finding a place that actually would give him a good deal on the oil that he wanted to buy.