My cousin is a big bargain hunter. If he can save a little bit of money, he is glad to do it. He will wait for coupons to show up in his grocery store, before he buys certain items. When he buys a car, he has everything checked out thoroughly and manages to talk the price way down. He wants to get the very best deal on anything that he spends his money on.
This is also true for his boat maintenance. He would never buy an inferior product, because it was cheaper. However, he would buy Mercury oil in bulk or on sale so that he could get the best deal that was possible. Whenever he sees it for cheap, he will buy it, even if he already has what he needs for quite a while. He won’t pass up the bargain.