90% of people buying homes were helped by a realtor in the last 10 years. Before most these people start to look for homes they sign a "buyer broker" agreement stating they are entitled to a 3% (standard could be less) commission on whatever home they decide to buy. If you as a seller offer no commission, or less than 3% for a buyer agent to "bring you a qualified buyer", a buyer would need to be willing to pay their realtor 3% of the sales price of the home out of their pocket to purchase your home. Most are not, so 90% of the people who show their realtor your home will opt to pass and look for another home instead since they cannot afford to pay their realtor up front. If you chose to not offer a buyer agent commission, statistics show you could potentially alienate over 90% of your market.