Retailers are smart. They know quite well that if they slash prices of some products and sell them in huge volumes they'll still make decent profits at the end of it all. And many shoppers often fall victim to this ruse. They could see a discount offered on something and it looks like so great a deal that desiring not to miss out, they'll buy something which they may probably never even use. Has the prospect of getting a discount made you buy something you didn't need [in the past]?