Buying, selling and investing in real estate involve complex transactions and high financial considerations. Given this, buyers, lenders and investors usually ask the help of real estate agents and real estate brokers to help them in their real estate needs. This is because real estate brokers and agents possess a thorough knowledge of the real estate market. They are also familiar with local zoning and tax laws and with financing agencies. In some cases, agents and brokers also act as intermediaries in the negotiations between buyers and sellers on the price of the property.