A realtor has the advantage of knowing the local real estate market very well, knows the demand, knows which properties are not in demand and knows the trends of the market. This closeness to the market will set the purchase and rental price at a realistic level. A real estate agent will save you a lot of time and nerves. One of the biggest advantages of a real estate agent is in the nature of things: realtors are methodical, deals extensively with your property, creates an exposé with professional pictures, places and advertises ads, coordinates viewing appointments and supports you in price negotiations.