To find a great deal in the real estate business, you must have local information. This includes the knowledge of the areas in your city that are considered better than others. For instance, while buying a home, you would need a good neighborhood. So, you should know about such areas.
There are many other aspects that affect the price of property, like construction of a new nearby road or some other infrastructure development.
You should have all this local information in order to be able to estimate the right value of a land or a building. You can get that here very easily. It is properly organized so you can understand it easily and use it for your advantage.