Shop owners in a weekly market and those in a shopping complex are very different people. One is a small trader with little money to run the shop whereas the other is able to spend a lot of money to set up the shop. They also earn unequal amounts. The weekly market trader earns little compared to the profit of a regular shop owner in a shopping complex. Similarly, buyers are differently placed. There are many who are not able to afford the cheapest of goods while others are busy shopping in malls. Thus, whether we can be buyers or sellers in these different markets depends, among other things, on the money that we have.