The home supermarket is that wonderful cornucopia of goods that you have spent years familiarising yourself with. Anything from Flour to condoms, kerosene to ocra can be had at extremely low prices.
Unlike most forms of retailing, where cost is the major limiting factor to limiting your purchases, supermarkets are a rare exception where finding your desired item is often harder than paying for it at 99% of the supermarkets around the world. However, your home supermarket tends to be the only supermarket in the world where the normal laws of retailing apply - you can find everything you want, just not neccesarily pay for it.